515 results about "Shellfish" patented technology

The present invention relates to the field of offshore wind power generation, and specifically to an offshore wind power generation device, which includes a floating platform and a wind power generation component arranged at the upper end of the floating platform. A plurality of traction components for pulling the floating platform are arranged below the floating platform, and the traction component includes an L-shaped frame fixed to the lower end of the floating platform, a traction rope is slidably connected to the L-shaped frame, and one end of the traction rope is fixed to the seabed; a circular plate is arranged below the floating platform, and a lifting component for lifting the circular plate and a guide component for guiding the circular plate during the lifting process are arranged on the floating platform; an annular plate is provided on the outer surface of the traction rope, and a cleaning component for cleaning shellfish attached to the surface of the traction rope is provided at the lower end of the annular plate. During the power generation operation, the offshore wind power generation device of the present invention automatically scrapes and cleans the shellfish on the surface of the traction rope through the cleaning component, so as to prevent the shellfish on the surface of the traction rope from affecting the stable power generation operation of the offshore wind power generation device.

The invention relates to the technical field of shellfish breeding, in particular to a rapid microalgae breeding method for shellfish breeding based on a photobioreactor and a cement pool. The method comprises the following steps: firstly, optimizing a photobioreactor structure and an illumination layout, controlling a culture environment by matching with a multi-parameter regulation and control system, breeding microalgae seeds with high resistance and high carbon sequestration capacity, culturing to a preset density, and partially harvesting and inoculating into a cement pond, after partial harvest, the photobioreactor realizes continuous culture by supplementing disinfected seawater and nutritive salt; the harvested high-density microalgae are inoculated into a cement pond, nutritive salt is supplemented in a doubled mode, air and carbon dioxide mixed gas is used for continuous aerated culture, and the microalgae are promoted to rapidly reach the index growth period and used for being directly fed to shellfish larvae; according to the rapid microalgae breeding method for shellfish seedling culture, the yield and quality of microalgae are both considered, the success rate and productivity of aquatic seedling culture are effectively improved, the production cost and the labor intensity of workers are reduced, and the method is suitable for large-scale popularization.

The invention relates to the technical field of biological coast evaluation, in particular to a shellfish reef artificial biological coast construction effect evaluation method and a shellfish reef artificial biological coast construction effect evaluation system. According to the expected construction requirement of the shellfish reef artificial biological coast, multiple capture channels are obtained through evolution tensor decomposition in the dynamic evolution simulation model, the capture channels are used for evaluating and analyzing the construction effect of the target biological coast, and the current revetment inhabiting effect, revetment development capacity and shellfish reef life quality of the target biological coast are obtained; fitting and evaluating the inhabitation effect of the current revetment, the development capability of the revetment and the life quality of the shellfish reef through polar coordinates of a multi-dimensional evaluation polar map frame, and performing standard grade judgment to generate a construction effect evaluation result of the artificial biological coast of the shellfish reef. According to the method, a shellfish reef construction effect quantitative evaluation system taking the revetment inhabiting effect, the revetment development capability and the shellfish reef life quality as three dimensions can be constructed, and the rationality and scientificity of shellfish reef artificial biological coast construction effect evaluation are improved.

The invention provides a buried shellfish harvesting device and method for bionic floating mud pressing and substrate improvement. The device comprises a shellfish roller screen separator and a bionic assembly, wherein the shellfish roller screen separator is arranged on a deck of a ship body and can separate shellfish; shellfishes and silt at the seabed are adsorbed into the shellfish roller screen separator through the shellfish collecting pipe, the shellfishes are separated and discharged through the shellfish roller screen separator, meanwhile, the silt mixed with microorganisms is screened out, and the shellfishes are discharged through the shellfish collecting channel arranged at the end of the shellfish roller screen separator. Sediment is discharged into the bionic assembly through a sediment collecting channel arranged in the shellfish roller screen separator; the bionic assembly is provided with multiple stages of box bodies, oxygenation is conducted on sediment, the proportion of water in the sediment is adjusted, and the sediment is discharged back to the seabed through a bionic discharging pipe. According to the shellfish collecting device, the seabed ecology can be effectively protected while shellfishes are collected.

The invention discloses an oyster carbon sink value evaluation method, model and equipment based on carbon sequestration amount, and a medium. The method comprises the following steps: collecting oyster breeding data in an oyster breeding process; the method comprises the following steps: respectively calculating an oyster body carbon sequestration amount, an oyster attached organism carbon sequestration amount and an oyster biological sediment carbon sequestration amount according to oyster breeding data, and summarizing the oyster body carbon sequestration amount, the oyster attached organism carbon sequestration amount and the oyster biological sediment carbon sequestration amount into a total oyster breeding carbon sink amount; and calculating the carbon sink value of the oysters according to the total carbon sink amount of the oyster culture. According to the method, a traditional culture shellfish carbon sequestration basic metering method is improved, carbon sequestration amount calculation is carried out on oyster bodies and biological sediments of attached organisms respectively, the more accurate oyster culture carbon sequestration total amount can be obtained, and the carbon sequestration income of oysters is calculated based on the carbon sequestration total amount. The method is beneficial to enriching the basic research in the field of shellfish culture carbon sink accounting, and enables the ecological service value of the shellfish culture industry to be compensated through carbon sink transaction.

The utility model discloses a mud flat shellfish collecting and sludge cleaning device, and belongs to the technical field of aquatic product breeding equipment. The device comprises a collecting mechanism, a cleaning mechanism and a driving mechanism, the collecting mechanism comprises a collecting bin and a screening and filtering component, and an inlet and an outlet are formed in the collecting bin; the cleaning mechanism is connected with the driving mechanism, the driving mechanism drives the cleaning mechanism to act, the driving mechanism comprises a driving pump, the cleaning mechanism is provided with a high-pressure water cleaning part, the high-pressure water cleaning part is provided with a high-pressure water inlet and a high-pressure nozzle, and the high-pressure nozzle is communicated with the collecting bin. The harvester is simple in structure and convenient to use, harvested objects are collected through the collecting mechanism, the cleaning mechanism is driven to act through the driving mechanism, the harvested objects can be cleaned, the harvested objects can be efficiently separated under the action of the screening and filtering component, the cleaning effect is good, the harvesting selectivity is high, and the harvesting efficiency is high. Filtered silt can be directly discharged back into a water area, so that other organisms in the water area are prevented from being damaged.

The utility model discloses a mud flat shellfish harvesting double-layer shovel device and shellfish harvesting equipment thereof. The mud flat shellfish harvesting double-layer shovel device comprises a supporting frame body, a harvesting double-layer shovel and a double-layer shovel driving mechanism. The harvesting double-layer shovel is rotatably installed on the supporting frame body and comprises a first harvesting shovel body and a second harvesting shovel body, the first harvesting shovel body is used for shoveling surface-layer substrates, the second harvesting shovel body is used for harvesting second-layer substrates and shellfish, and a plurality of screen holes are formed in the surface of the second harvesting shovel body; the double-layer shovel driving mechanism is used for driving the harvesting double-layer shovel to vibrate so as to complete shellfish harvesting; compared with an existing single-layer shovel, the harvesting double-layer shovel has the advantages that after the first harvesting shovel in the harvesting double-layer shovel shovels the surface mud flat substrate, the harvesting resistance of the second harvesting shovel can be reduced, in addition, the thickness of the mud flat substrate harvested by the second harvesting shovel is small, screening of mactra veneriformis is facilitated, the mactra veneriformis screening efficiency is improved, and the working efficiency of the mactra veneriformis is improved. Therefore, the overall harvesting efficiency can be improved.

The invention relates to the technical field of sewage purification, and particularly discloses a pollution reduction type water quality purification method combining shellfish and grass carp bacteria and algae. The invention relates to a pollution reduction type water quality purification method combining shellfish and grass carp bacteria and algae. The method comprises the following steps: S1, collecting, adjusting and precipitating sewage through a pretreatment unit, and intercepting solid garbage at the same time; s2, introducing the pretreated sewage into a fish-fungus-algae symbiotic unit, putting fungi and algae into the unit, and stocking herbivorous fishes; s3, effluent of the fish-fungus-algae symbiosis unit is guided into a shellfish purification unit, and shellfish is put into the shellfish purification unit; s4, leading effluent of the shellfish purification unit into an aquatic plant purification unit, and planting aquatic plants in the aquatic plant purification unit. The pollution reduction type water quality purification method combining the shellfish and grass carp bacteria and algae can be used for scenes such as village and town domestic sewage, agricultural non-point source pollution and sewage treatment plant tail water, and has the advantages of pollutant reduction and water body self-purification capability reconstruction.

The invention discloses a lake and bay habitat maintenance method based on hierarchical calculation, and relates to the technical field of water ecological environment protection and ecological restoration, the effective water body volume of a lake is accurately calculated by combining terrain scanning with a partition weighted correction formula, and the volume estimation deviation of a traditional method is avoided; on the basis, the existing biomass of the plankton is subjected to layered correction, and the estimation precision of the primary productivity of the lake is improved, so that a scientific basis is provided for the proliferation capacity of filter-feeding fishes. Through water level and water quality dynamic correction and in combination with submerged vegetation population structure regulation and control, vegetation degradation caused by excessive ingestion of fishes can be effectively avoided. Further introducing batch stocking of the snails and the shellfish, constructing a closed-loop mechanism of snail ingestion-plankton reproduction-shellfish filter feeding-fish utilization-vegetation restoration, finally forming a fish, shellfish, snails and grass synergistic ecological balance system, and realizing long-term stable maintenance of the lake and bay habitat.

The invention relates to the technical field of ecological breeding of scylla paramamosain and protection and restoration of mangrove forests. The invention provides a method for culturing scylla paramamosain by using mangrove forest, which comprises the following steps: (1) carrying out simple engineering transformation on the basis of a coastal wetland traditional culture pond, constructing a planting island in the middle of the culture pond, and reserving an annular tidal creek between the planting island and the periphery of the culture pond; (2) planting mangrove plants in the planting island to form a man-made forest; (3) small aquatic plants are planted at the bottom of the artificial forest, and large algae are planted in the annular ditches; and (4) putting the young blue crabs into the culture pond, and carrying out daily management until the blue crabs are harvested. The shellfish is used for providing main food supply for the blue crabs, and meanwhile water is purified; excrement of the blue crabs can be fed back to promote growth of mangroves, algae, mussels and the like; large algae can perform photosynthesis at the bottom of the pond to increase dissolved oxygen in water, and small sea grass is placed in the planting island to make up for the defect of low coverage of newly planted mangrove forest plant seedlings.

The invention discloses a composite inducer for promoting adhesion and metamorphosis of marine bivalve mollusk larvae and an application method of the composite inducer. The composite inducer for promoting adhesion and metamorphosis of the marine bivalve mollusk larvae comprises glutamine, glutamic acid, potassium chloride, calcium chloride and taurine, and the concentration ratio of the glutamine to the glutamic acid to the potassium chloride to the calcium chloride to the taurine is 1: 1: 2 * 10: 1.7 * 10: 4. According to the application, glutamine, potassium ions, calcium ions, glutamic acid and taurine are matched, the application effect of the glutamine, the potassium ions, the calcium ions, the glutamic acid and the taurine in the aspect of improving the attachment and metamorphosis rate of the shellfish larvae is defined, the technical blank of multi-component cooperative regulation and control of the attachment and metamorphosis of the shellfish at present is filled, a new solution is provided for bivalve shellfish fry production, and the application prospect is wide. The method is of great significance in promoting healthy development of the mariculture industry.

The utility model discloses a shovel tooth combined type mud flat shellfish digging device with adjustable spacing, which relates to the technical field of mud flat shellfish digging operation, and comprises a cross beam and a plurality of digging shovels fixedly arranged on the cross beam, comb teeth are uniformly arranged among the digging shovels, the comb teeth are arranged on the cross beam, the spacing of the comb teeth is adjustable, and the shovel tooth combined type mud flat shellfish digging device is arranged on the cross beam. The digging shovel is provided with multiple types of protruding structures, and the comb teeth are designed to be of a gradually-changing-size structure. Due to the design of various protruding structures on the shovel body of the digging shovel, mud flat silt can be better cut during digging, soil entering resistance can be reduced, and soil adhesion is prevented. The comb teeth are of a size gradual change type structural design, the soil penetrating size is gradually changed during excavation, soil penetrating resistance can be reduced, and the hilling phenomenon is reduced. The digging shovel and the comb teeth are adopted for cooperative operation, the soil breaking capacity of the digging shovel can be kept, the soil penetrating resistance is reduced through the comb teeth, part of soil is screened out in the digging process, and the soil hilling phenomenon is reduced.

Present embodiments relate to a shellfish shucking knife preferably having multiple blades, including at least a hinge blade and a muscle-cutting blade.

A deep water drawing step of drawing deep water that exists in a deep region of the sea to a surface region of the sea with an upwelling pipe (1); and a phytoplankton culturing step of culturing the phytoplankton in the upwelling pipe (1) are included to produce, as a basic producer of a food chain, a living marine resource, such as fishes and shellfishes, with phytoplankton produced in the phytoplankton culturing step.

The utility model discloses a shellfish vibrating, liquefying and harvesting device and shellfish harvesting equipment thereof. The shellfish vibrating, liquefying and harvesting device comprises a supporting frame body, a vibrating and harvesting unit and a vibrating and driving unit, the vibration harvesting unit comprises a lifting plate and a plurality of slapping plates; the striking and vibrating driving unit is arranged on the supporting frame body and is used for driving the plurality of slapping plates to perform lifting, striking and liquefying on the mud flat substrate so as to realize floating of shellfish in the liquefied mud flat substrate; according to the utility model, the striking driving unit can drive the slapping plates to lift at high frequency, and the slapping plates can strike and slap the surface of the mud flat substrate soil at high frequency, so that the mud flat substrate generates a soil liquefaction phenomenon, and mactra veneriformis buried in the mud flat substrate can float up to the surface of the mud flat substrate; compared with an existing digging and harvesting device, the digging and harvesting device does not need to dig mud flat substrates for screening and harvesting, the power needed by the harvesting device is small on the premise that the ecological environment is protected, and cost reduction and efficiency improvement are facilitated.

The invention discloses a marine ranch carbon sink breeding device and method, and belongs to the technical field of marine fishery. Wherein the culture device adopts a modular design of combining vertical layering and horizontal partitioning, and comprises an upper-layer algae culture module, a middle-layer fish culture module, a bottom-layer shellfish culture module and a seabed carbon deposition auxiliary module, and all the modules can be flexibly combined according to the sea environment. Breeding parameters are regulated and controlled in real time through the intelligent monitoring system, and efficient fixation and storage of carbon dioxide are achieved through the biological carbon fixation principle. The breeding method comprises the whole process of site selection, module assembling and putting, ecological regulation and control and carbon sink metering. The system has a carbon sink function and fishery output benefits, solves the problems of ecological imbalance and difficult carbon sink metering of a traditional breeding mode, and provides a standardized and intelligent solution for marine ranch carbon sink breeding.

This invention relates to the field of pet nutrition technology, and more particularly to a fresh dog food for improving coat health and its preparation method. The fresh dog food of this invention comprises component A and component B. Component A includes the following components in parts by weight: 40-45 parts venison, 10-12 parts mussels, 8-10 parts chicken liver, 8-10 parts duck egg, 3-5 parts carrot, 3-5 parts broccoli, 3-5 parts pumpkin, 3-5 parts taro, 3-5 parts avocado, 0.8-1 part dried red dates, 0.8-1 part dried rose petals, 0.5 parts whey calcium, 1.3 parts malt powder, 0.5 parts inulin, 0.5 parts brewer's yeast, and 0.2 parts fish oil. Component B is Bacillus subtilis; the viable count of Bacillus subtilis is 1×10⁻⁶. 9 CFU / g. This invention utilizes the synergistic effect of deep-sea shellfish and venison to improve the coat quality of puppies, increasing the coat diameter by ≥23.1% and the scale thickness by ≥32.4%.

The invention discloses cleaning and draining equipment for shellfish aquatic products. The cleaning and draining equipment comprises a shell, a transmission mechanism, a cleaning mechanism and an elastic pressing mechanism, wherein the transmission mechanism, the cleaning mechanism and the elastic pressing mechanism are arranged in the shell; the cleaning mechanism comprises a first cleaning assembly and a second cleaning assembly which are arranged on the upper side and the lower side of the conveying mechanism correspondingly; wherein the conveying mechanism drives the shell aquatic products to sequentially pass through a cleaning area below the first cleaning assembly and a cleaning area above the second cleaning assembly, and the elastic pressing mechanism is arranged on the side, provided with the first cleaning assembly, of the conveying mechanism and used for abutting against the impact of the second cleaning assembly on the shell aquatic products. By means of the shell cleaning device, the convex face and the concave face of a shell can be cleaned at the same time in one procedure, a second cleaning procedure is not needed, meanwhile, the edge of the shell can be prevented from being damaged through the elastic pressing function, and the completeness and the appearance condition of the shell are kept.

The invention relates to the technical field of shellfish breeding, in particular to a shellfish breeding seedling screening machine which comprises a seedling screening pool, a seedling screening cylinder, a feeding part, a receiving part, a pair of mounting seats and a driving mechanism, the seedling screening cylinder is arranged in the seedling screening pool, the two mounting seats are symmetrically arranged on the two sides in the seedling screening pool, and the driving mechanism is arranged on one mounting seat and is arranged on the other mounting seat. The driving part is used for driving the seedling screening barrel to rotate, one end of the seedling screening barrel is rotationally connected with a feeding opening connected with the feeding part, the other end of the seedling screening barrel is rotationally connected with a discharging opening connected with the receiving part, and the feeding opening and the discharging opening are formed below the two mounting seats respectively; and a plurality of baffle plates which are obliquely distributed in the same direction are fixed on the inner wall of the seedling screening cylinder at intervals around the axis of the seedling screening cylinder. The temporary storage inclined opening is formed by the blocking pieces obliquely arranged on the inner wall of the seedling screening barrel and the seedling screening barrel, qualified seedlings can be sequentially carried to be upwards transferred to the material collecting mechanism when the seedling screening barrel rotates, the qualified seedlings are obliquely guided and conveyed through the material collecting mechanism, and body surface damage and activity reduction caused by mechanical extrusion of the seedlings are avoided.

The application discloses a kind of based on bottom sowing mode's spiral shell class aquaculture device, it is related to aquaculture field, it solves the problem that existing cultivation device can cause seedling to be unable to climb out from temporary housing box, including: bottom frame and four side frames being arranged in the outside of bottom frame, the top of side frame is provided with top frame, soft tube is arranged between four top frames, the top of soft tube is installed with mounting bracket, the top of mounting bracket is installed with float ball;It further includes: seedling releasing mechanism, for safely releasing seedling to seabed, seedling releasing mechanism is installed on the top of bottom frame, seedling releasing mechanism includes two sleeve seats being fixedly installed on the top and bottom of side frame respectively;The application is by seedling releasing mechanism, so that bottom frame, side frame and top frame form cubic frame structure, realize the temporary storage of seedling, and when bottom frame is close to seabed, side frame and top frame are automatically opened, realize bottom sowing of shell seedling, facilitate seedling to climb into seabed, and improve bottom sowing efficiency, to reach the effect of efficient bottom sowing, applicable to bottom sowing of multiple batches of seedling.

The utility model discloses a shellfish-shaped grab bucket, which relates to the technical field of machinery and comprises two grab bucket frames, side plates on two sides of the two grab bucket frames are connected through a lifting wheel pin shaft, the two grab bucket frames swing around the lifting wheel pin shaft to realize opening or closing of the two grab bucket frames, and a lifting wheel is arranged at the upper ends of the two grab bucket frames. The lifting frame is hinged to the lower end of the lifting pull rod through a lower shaft pin, and the upper end of the lifting pull rod is hinged to the lifting frame through an upper shaft pin; a lifting reel is arranged in the middle of the lifting wheel pin shaft and connected with a steel wire of a crane in a twisted mode, and the two grab bucket frames are controlled to be opened or closed through lifting of the steel wire. And a tooth-shaped auxiliary grabbing plate is arranged at a clamping opening of the two grab bucket frames. The grab bucket can solve the problems that in the prior art, when a grab bucket grabs materials which are prone to adhesion or hardening, the grabbing efficiency is low, and the grabbing quality is not high.

The invention provides a fresh water benthic shellfish grading seedling raising system and method, and relates to the technical field of shellfish seedling raising, the fresh water benthic shellfish grading seedling raising system comprises a plurality of stages of seedling raising units, and each stage of seedling raising unit comprises a seedling raising device, a water circulation device and a nutrient solution input device; the water circulation device is communicated with the nutrient solution input device; the nutrient solution input device is communicated with the seedling culture device; the seedling raising device in the upstream seedling raising unit is communicated with the water circulation device in the downstream seedling raising unit, and liquid discharged by the seedling raising device in the upstream seedling raising unit can enter the water circulation device in the downstream seedling raising unit. By means of the system, classified cultivation of the young mussels is achieved, each stage of the young mussels are provided with a nutrient solution input device, the young mussels are cultivated according to the development characteristics and growth requirements of the young pearl mussels and the nutrient ratios of different growth stages, the growth uniformity and cultivation quality of the young mussels and the unit yield of the young mussels are improved, water recycling is achieved, and the cost is reduced. And the resource utilization rate is improved.

To provide a system and method for maintaining the freshness of fish and shellfish or derivatives thereof, which can maintain the freshness of caught and dead fish and shellfish or derivatives thereof such as sashimi by a simple method, and further prevent the disposal of the fish and shellfish or derivatives thereof. [Solution] The freshness preservation system for seafood or seafood derivatives comprises at least one coil (30) with 10 to 20 turns, and an AC current supply device (40) for supplying a square wave AC current of 100 mA to 3 A to the coil, which repeats a linear increase and decrease in frequency 2 to 5 times per second in the frequency range of 4.5 kHz to 8 kHz. The freshness of the seafood or seafood derivatives is maintained by keeping the coil and the seafood or seafood derivatives close to each other or by bringing them close to each other while passing the AC current through the coil.

The invention discloses a fish and shellfish symbiosis seaborne net cage culture system and method, and relates to the technical field of aquaculture, and the method comprises the following steps: arranging a culture net cage in an offshore sea area; fish fries are put into a surrounding net, bivalve shellfishes are put into a shellfish culture piece cage, and the shellfish culture piece cage is hung in the culture net cage; feeding bait irregularly, checking the integrity of the shellfish culture cage and the covering condition of attachments regularly, and making a treatment means according to the covering rate; in the later period of culture, the adult fishes with the body length exceeding a preset value are caught irregularly in a fishing mode, and after the culture period is finished, the remaining adult fishes are caught in a concentrated mode by increasing the height of the purse seine; the shellfish culture piece cage is lifted out of the water surface to collect adult shellfish. The culture system disclosed by the invention comprises a culture net cage and shellfish culture piece cages, wherein the shellfish culture piece cages are hung in a purse seine. According to the method, mutualism of marine fishes and bivalve shellfish can be achieved, the resource utilization rate and the culture benefits are improved, and diversified fishery development can be achieved.

The invention relates to the field of shellfish processing, and discloses a sauce for shellfish food and a processing method thereof.The sauce is obtained by decocting garlic, ginger, anise, cinnamon, fennel, dried chilli, pepper, lemongrass powder, myrcia and pericarpium citri reticulatae, and the sauce is used for processing the shellfish food; the method has the effects of balancing the fishy smell of the shellfish seafood and improving the fresh and fragrant level.

The invention relates to a wave energy linkage type shellfish polishing cultivation device, and belongs to the technical field of marine product cultivation. Comprising supports fixed to the two sides of an offshore platform, a driving mechanism is arranged on one support, a driving side transmission device and a driven side transmission device are installed on the two supports respectively, the other end of the driving side transmission device and the other end of the driven side transmission device are both connected with a mesh cage, and the driving mechanism drives the mesh cage to rotate through the driving side transmission device. According to the invention, through the design of the driving device and the net cage structure, the net cage can automatically rotate under the conditions of less sea waves and static conditions, so that marine products in the net cage can also move along with the rotation of the net cage, and the shellfish products are ground by utilizing the force of the waves, so that the quality of the shellfish products is higher. Meanwhile, the rotation movement also promotes the exchange of internal and external water bodies, increases the dissolved oxygen content in the water, and improves the breeding environment.

The invention relates to odorless lyophilized fish roe powder with high nutritional value that can be used in baby supplement foods (baby food, baby biscuits, baby noodles, baby soups, etc.) and as functional food from edible eggs of marine, freshwater and shellfish products and its preparation method.

The invention discloses an efficient low-loss shellfish cleaning system and method.The system comprises a cleaning tank, a cavitation nozzle assembly, a cleaning brush roll assembly and a spraying assembly are arranged in the cleaning tank, the cavitation nozzle assembly comprises a plurality of cavitation nozzles, and the cavitation nozzles are connected with the high-pressure water outlet end of a water pump through a high-pressure pipeline; the multiple cavitation nozzles are arranged at intervals in the length direction of the two sides of the inner wall of the cleaning tank, and the pressure and the incidence angle of each cavitation nozzle can be adjusted. The cleaning brush roller assembly comprises a plurality of cleaning brush rollers which are arranged in parallel in the length direction of the cleaning tank (1), and each cleaning brush roller is in driving connection with a set of independent transmission module; the spraying assembly is located above the cleaning brush roller assembly and used for injecting water into the cleaning tank and supplementing water to the cleaning tank. Through cooperative cleaning of cavitation water jet and mechanical scrubbing, the cleaning efficiency is remarkably improved, meanwhile, damage to shellfish shells is effectively avoided, the stress reaction of the shellfish shells is effectively reduced, and therefore the shellfish cleaning rate is larger than or equal to 95%, the damage rate is smaller than or equal to 3%, and the survival rate is larger than or equal to 99%.

To provide fish and shellfish feed, fish and shellfish feed additives, a method for producing fish and shellfish feed, and a method for raising fish and shellfish that can produce fish and shellfish in good health. [Solution] The following components (A) and (B): (A) Non-polymerized catechins 0.001-1.5% by mass (B) Oligosaccharides A fish and shellfish feed containing [this ingredient].

The present invention relates to the technical field of fish farming, and discloses a green and environmentally friendly rail-type fish cage, comprising a fixed plate, wherein the lower part of the fixed plate is connected to an external cleaning mechanism, the external cleaning mechanism is used to clean the outside of the cage, the fixed plate is provided with an internal cleaning mechanism, the internal cleaning mechanism is used to clean the inside of the cage, the fixed plate is provided with an automatic feeding mechanism, the automatic feeding mechanism is used to automatically feed, and can clean the surface of the cage, and scrape off shellfish adsorbed on the surface of the cage during cleaning, thereby extending the service life of the cage and providing a better environment for fish farming; automatic feeding can be achieved without manual feeding, and movement and direction can be adjusted during feeding and fish discharge, thereby reducing labor costs; excess bait can be recovered, and the cage can be supported and fixed, thereby increasing the stability of the cage.