88 results about "Fresh water fish" patented technology

The invention relates to the technical field of flavor agents, and provides a freshwater fish flavor pet flavor agent and a production method thereof, and the freshwater fish flavor pet flavor agent comprises the following components: freshwater fish, an enzyme preparation, reducing sugar, vitamins, amino acids, auxiliary materials and a herbaceous plant aqueous extract. Through scientific raw material selection, enzymic preparation proportion control, multi-element reducing sugar matching, comprehensive vitamin combination, balanced amino acid screening, herbaceous plant aqueous extract addition, nanotechnology wrapping operation and careful adjustment of auxiliary materials, the pet flavoring agent has the effects of special fragrance, rich taste, good palatability, immunity enhancement and the like.

The invention relates to method for obtaining collagen from animal sources such as fresh or saltwater fish, chicken, eggs or from parts of these animal sources that can be considered waste, and to a collagen hydrolysate obtained as a result of this method.

The invention discloses a low-carbon freshwater fish feed added with fermented bamboo powder and application of the low-carbon freshwater fish feed, and belongs to the technical field of aquatic animal feeds. The low-carbon freshwater fish feed capable of reducing the fat rate of fish bodies and / or reducing nitrogen and phosphorus emission is prepared from the fermented bamboo powder, and the content of vitamins, enzymes and growth factors in the feed can be increased by adding the fermented bamboo powder, so that the freshwater fish bodies have good anti-pathogenic activity; the absorption and utilization of the freshwater fish on nutritional ingredients and fiber-rich ingredients in the feed are improved, so that the aim of reducing the emission of nitrogen and phosphorus is fulfilled; meanwhile, the fermented bamboo powder is used for partially replacing soybean meal in the freshwater fish feed, so that the dosage of feed raw materials such as the soybean meal is reduced, the intestinal health of the freshwater fish is improved, the muscle quality of the freshwater fish is improved, the earthy smell in muscles is reduced, the body type of the freshwater fish is also improved, and the fat content in abdominal muscles is reduced.

The invention relates to the technical field of freshwater fish culture, and discloses a culture box for freshwater fish culture, which comprises a culture box and a feeding tank, the top of the feeding tank is fixedly connected with a feeding hopper, and a feeding mechanism is arranged in the feeding tank; the feeding mechanism comprises a motor, a vertical shaft, a disc, movable teeth and fixed teeth; the motor is fixedly connected to the outer wall of the top of the feeding tank, the output end of the bottom of the motor penetrates into the feeding tank, animal livers in the smashing chamber are smashed into small blocks through friction and collision of movable teeth and fixed teeth, swallowing of the mandarin fish fries is facilitated, growth and development of the mandarin fish fries are facilitated, a bent pipe is driven by a disc to rotate, and the feeding efficiency is improved. The feeding range is expanded through the rotating bent pipe, and the gear and the rack are arranged to move back and forth in the rotating process of the bent pipe, so that the feeding range of the bent pipe is further expanded, mandarin fish fries are prevented from being grabbed by adult fishes during concentrated feeding, mandarin fish ingestion is more uniform, and the overall mandarin fish growth efficiency is improved.

The invention discloses a fishpond precise feeding robot system based on YOLOv8. The fishpond precise feeding robot system comprises a robot control module, a data acquisition and processing subsystem, a freshwater fish feeding data acquisition subsystem, a cloud server and a wireless information transmission subsystem. The system can intelligently judge the feeding opportunity and the feed amount by detecting the gathering condition of fish schools in real time, the feed utilization rate is remarkably improved, healthy growth of the fish schools is promoted, and therefore the overall breeding benefit is improved; due to automatic operation of the system, dependence on manual feeding is reduced, the labor cost is reduced, feed residues are reduced through precise feeding, the water quality is improved, and sustainable development of the breeding environment is maintained; the system has real-time monitoring and data analysis functions, can provide historical data records, supports decision optimization of breeding management, and realizes a modernized and intelligent breeding mode.

The present invention provides a compound feed for freshwater fish and a preparation method thereof, comprising the following raw materials in parts by weight: 39-44 parts of corn protein powder, 22-34 parts of cottonseed protein powder, 5.4-9.2 parts of black soldier fly larva powder, 11-23 parts of fish oil, 20-30 parts of Schizochytrium powder, 7.5-12.4 parts of soy lecithin powder, 4-10 parts of maltitol, 8-12 parts of sodium butyrate, 8-15 parts of Chinese herbal medicine liquid, 0.2-0.8 parts of compound fermenting agent. Through steps such as raw material mixing, Chinese herbal medicine liquid fermentation, homogenization, puffing and spray drying in sequence, the feed quality control is carried out, so that the compound feed has a relatively high absorption rate and palatability, ensures the intake of the components of the Chinese herbal medicine fermentation liquid, significantly improves the survival rate and growth rate of freshwater fish, and has remarkable economic benefits.

The invention relates to the technical field of otolith sample preparation, in particular to a freshwater fish otolith sample preparation method which comprises the following steps: 1, sampling otolith; 2, otolith cleaning; 3, weighing the otolith; 4, fixing the otolith; 5, vacuumizing and hardening; 6, cutting the otolith; 7, fixing and cutting for the second time; 8, otolith polishing; 9, polishing the otolith; 10, otolith dyeing. According to the method, the freshwater fish otolith sample can be well prepared.

The proposed invention corresponds to a fish treatment system for disinfection and deworming in situ, using a system of tubes for the transport of live fish throughout the system in fresh water, obtained directly from salt water or spring water. sea, where the fish are transported by the different sections of the disinfection system from the diseased fish farming unit, through the treatment pond and to the treated fish farming unit, where the removal of parasites in fresh water It is carried out by chemical, electrochemical, mechanical and energetic means, in the treatment pond and later, the treatment water is treated for the removal of medicine and finally reconstituted to the initial conditions (sea water) to be returned to the environment.

The utility model provides a fry hatching device, which relates to the technical field of fry hatching and comprises an adult fish box, a hatching box fixedly connected to the bottom of the adult fish box, a baffle fixedly mounted in the hatching box and a separation component arranged in the hatching box, and the separation component comprises a guide funnel, a hatching frame, a connecting column and a supporting block; the cleaning assembly is arranged at the bottom of the baffle and comprises a collecting tank, a collecting pipe, a circulating pump, a backflow pipe and a triangular scraper. According to the fish fry hatching device, the separation assembly can make freshwater fish roe balls adhere to the hatching frame, fish food residues are not sticky and can fall to the position above the baffle, it is ensured that the fish food residues of adult fishes cannot be mixed with the fish roe balls, through arrangement of the cleaning assembly, the fallen fish food residues and the like are scraped into the collecting groove, and the fish roe balls are prevented from being damaged. And then residues are sucked out along with water flow through the circulating pump, so that the interior of the incubator is cleaned, the incubation water quality is improved, and fry are not affected by the water quality and are incubated smoothly.

The present invention provides a method for domesticating mandarin fish using large-scaled paraloach as transit bait, and belongs to the field of freshwater fish seed breeding. The mandarin fish domestication method provided by the present invention goes through four stages: starvation → live bait feeding → transit feeding → feed, and the transit feeding of mandarin fish involved includes: fresh dead loach coated with powder → fresh dead loach coated with powder + ice-fresh loach coated with powder → ice-fresh loach coated with powder + feed. The present invention uses loach as transit bait, which not only cleverly caters to the mandarin fish's unique visual response mechanism for feeding, but also significantly improves the feeding efficiency during the feed conversion process, makes full use of the loach's flexible body shape and ability to swim quickly in the water, and perfectly matches the mandarin fish seedlings' extremely high desire to prey on dynamic and active small aquatic organisms, opening up a new efficient and environmentally friendly way for the feed domestication of mandarin fish seedlings. The domestication procedure is highly replicable, with low loss of mandarin fish fry, high domestication rate, few diseases, fast growth of mandarin fish fry and excellent quality.

The invention relates to the technical field of traditional fermented food processing, and discloses flavor-improved fish tea and a low-salt fermentation preparation method thereof.The preparation method comprises the steps that pretreated freshwater fish blocks and steamed rice are mixed, aspergillus oryzae is inoculated for aerobic culture, and fish tea koji is prepared; then mixing with a low-salt seasoning group, inoculating lactobacillus plantarum and other safe and basic flavor bacteria, and carrying out anaerobic lactic acid fermentation; adding dormant-state saccharomyces cerevisiae spore particles, carrying out pressure difference activation treatment, and continuously carrying out yeast aroma-producing fermentation; and finally, after-ripening and sterilizing to obtain a finished product. Through the synergistic effect of fish tea koji pre-enzymolysis, functional bacterial system sequential inoculation and differential pressure activated yeast, high biological safety under the low-salt condition is achieved, the flavor layering sense and the taste fullness of the product are remarkably improved, and the accuracy and stability of the fermentation process are improved.

The utility model discloses freshwater fish loading auxiliary equipment, which relates to the technical field of loading and unloading auxiliary equipment and comprises a support frame, a power component is fixedly mounted on one side of the bottom of the support frame and comprises a second motor and a first motor, and a lifting mechanism is mounted on the other side of the support frame. The lifting mechanism comprises a fixed assembly, a movable assembly and a connecting rod, and the bottom of the fixed assembly is movably connected with the movable assembly through the connecting rod. And the height can be rapidly and accurately adjusted according to the heights of cargo compartments of different vehicles through the material guiding assembly, the fish basket does not need to be manually and frequently carried or the position of equipment does not need to be manually and frequently adjusted, manpower and time are greatly saved, and the loading efficiency is improved.

The invention relates to the field of aquatic product muscle quality regulation and control. A method for improving muscle quality of fish by regulating intestinal microenvironment through a neuroendocrine system is characterized by comprising the following steps: 1) sterilizing a temporary rearing pond, injecting aerated water to 2 / 3 of the height of the temporary rearing pond, and regulating dissolved oxygen in the water to be 5.0-8.0 mg / L, water temperature to be 16-24 DEG C, pH to be 7.2-8.0 and ammonia nitrogen content to be lower than 0.5 mg / L by using an aerator; (2) adding a mixed input of 50-100 mg / L of lactobacillus brevis MN047 and 20-50 mg / L of lotus rhizome node extract into the water, and stirring to enable the mixed input to be uniformly dispersed; (3) putting fresh and alive freshwater fishes into the temporary rearing pond according to the rearing density of 20-30kg / m < 3 >, and fasting the fishes during temporary rearing; (4) temporary rearing; 5) waiting for detection in a refrigerator at-80 DEG C; (6) determining; and 7) analyzing the data. According to the method, the stress reaction can be relieved after fish stress, neurotransmitters are secreted, intestinal microbial flora is regulated, and then muscle quality deterioration caused by the stress reaction is relieved.

The invention discloses a specific primer probe combination for detecting jaw nematode and application of the specific primer probe combination, and belongs to the technical field of biology. The specific primer and probe combination comprises an upstream primer GncoxF6, a downstream primer GncoxR6 and a probe GncoxP. The method, which is established by using the specific primer probe combination and based on the RAA method, for detecting the jaw nematode is high in specificity, good in repeatability and high in sensitivity, the lowest detection limit can reach 0.1 fg / mu L, and the method has no cross reaction with common parasites in freshwater fishes such as capillary nematode, stomach tumor nematode and Angiostrongylus cantonensis. The method provided by the invention is rapid in detection, provides a convenient and simple method for on-site screening of the jatrostoma spiniferum, and has very high scientific research and practical values.

The invention provides a novel freshwater fish factory recirculating aquaculture system, which comprises a culture pond, a vertical flow precipitator, a microfilter pond, a biochemical air floatation pond, a sand cylinder filter, a nano denitrification system and a multi-stage air stripping system, the culture pond is respectively connected with the vertical flow precipitator and the microfilter pond, the vertical flow precipitator is connected with the microfilter pond, the biochemical air floatation pond is connected with the sand cylinder filter, the nano denitrification system is connected with the biochemical air floatation pond, and the multi-stage air stripping system is connected with the sand cylinder filter. The biochemical air floatation tank is connected with the microfilter tank through a pipeline, the biochemical air floatation tank comprises an air floatation bin, a pump bin, a biochemical bin and a denitrification bin, and the pump bin is respectively connected with the sand cylinder filter, the nano denitrification system and the multi-stage air stripping system through pipelines; and circulating pumps are arranged on pipelines for connecting the pump bin with the sand cylinder filter, the nano denitrification system and the multi-stage air stripping system. According to the invention, the multi-stage cooperative treatment system is constructed and the denitrification system is introduced, so that the total nitrogen removal rate of the culture system is increased to 96%, which is increased by 140% compared with that of the traditional system, the water supplementing amount of the system is reduced, the daily water supplementing amount is reduced to less than 3%, and the water saving rate of the total amount of circulating water exceeds 70%.

The jelly food is produced by using the whole fish meat as the raw material, and the product is rich in high-quality protein, EPA, DHA, collagen and mucopolysaccharide, and has extremely high nutritional value of the whole fish meat. Physical fishy smell removal of ginger, garlic and cooking wine is utilized, meanwhile, 5-10 parts of fresh yeast and 5-10 parts of soybean cakes are used for preparing fishy smell removal liquid, biological fishy smell removal is conducted on 100 parts of whole fish meat, and the fishy smell of the fish meat is effectively removed. By adding tea polyphenol, the gel strength and elasticity of the product are improved, and meanwhile, the stability of the product quality is effectively improved. The microwave technology is adopted to combine a thermally induced gelation process and a sterilization process, the microwave power is 0.5-20 kW, the treatment time is 60-600 s, the gelation process is achieved, and microorganisms are effectively killed. According to the invention, the fishy-smell-removed freshwater fish jelly can be obtained, and the leisure food has soft, crisp and tender texture, fine and smooth taste, high protein and low fat, has extremely high nutritional value of whole fish meat, and can be stored for a long time at normal temperature.

The utility model discloses a culture device for freshwater fish culture in the technical field of freshwater fish culture, which comprises a culture pond, the bottom of the culture pond is fixedly connected with a conical base, the middle of the bottom end of the conical base is fixedly connected with a collecting hopper, and one side of the collecting hopper is fixedly connected with a blow-off pipe. Fish breeding is facilitated through the arranged breeding pond, excrement and feed residues in the breeding pond are conveniently collected into a collecting hopper through the arranged conical base, impurities attached to the surface of the conical base are scraped off through a scraping plate driven by operation of a gear motor, and then the impurities are collected into the collecting hopper; excrement and feed residues in the collecting hopper are discharged through the sewage pump and the sewage discharge pipe, and the use effect of the culture pond is improved.

The utility model relates to the technical field of freshwater fish breeding, and discloses a reservoir ecological freshwater fish rotifer preying device which comprises a material tank, a lower floating block for providing buoyancy is arranged at the bottom of the material tank, a motor is fixedly installed in the middle of the top side of the material tank, and six sets of discharging openings are formed in the bottom wall of the material tank in an array mode. A feeding assembly used for assisting in feeding rotifers is arranged in the material tank, a triggering assembly used for triggering and starting the feeding assembly is arranged in the middle of the supporting plate, and a photovoltaic panel used for providing power for all the components is arranged on the outer side of the material tank. Fish schools can be attracted to gather through the bionic bait, when the fish schools bite the bait, the guide rod can be driven to move downwards, so that the contacts make contact with one another, then the motor can be started, the gear disc rotates to drive the rotating rod to rotate, and then the spiral discharging rod is driven to rotate in the discharging opening to assist in rotifer throwing; therefore, fish schools can prey conveniently, and waste is avoided.

The invention discloses agricultural freshwater fish feed throwing equipment which comprises a floating table, an angle adjusting motor is fixedly connected in the floating table, a mounting seat is fixedly connected to the output end of the angle adjusting motor, a throwing machine is fixedly connected to the mounting seat, a throwing mechanism is arranged in the throwing machine, and a sealing cover is rotatably mounted at the upper end of the throwing machine. A plurality of connecting arms are fixedly connected to the periphery of the floating table, threaded mounting holes are formed in the connecting arms, and threaded heads are mounted in the threaded mounting holes in a threaded mode. By utilizing buoyancy provided by the floating table and the floating ball, the device can directly float at the center of a water area, feed can be directly thrown at the center of the water area, the angle adjusting motor is started to drive the mounting base to rotate, the throwing machine is fixedly mounted on the mounting base, and then the mounting base rotates to drive the throwing machine to rotate; the throwing machine rotates to throw the feed around, and compared with an existing shoreside throwing mode, the throwing range is larger.

The utility model discloses a fish fry cultivation box for freshwater fish cultivation, belongs to the technical field of fish fry cultivation boxes, and solves the problem that fish fries are inconvenient to take out in an existing fish fry cultivation box. The device comprises a box body, a cultivation tank is contained in the box body, an oxygen supply assembly used for supplying oxygen to the cultivation tank is fixed to the bottom of the box body, lifting mechanisms are fixed to the two side walls of the box body, rotating mechanisms are fixed to the tops of the lifting mechanisms, the cultivation tank is fixed to the rotating ends of the rotating mechanisms, and the lifting mechanisms lift the rotating mechanisms to drive the cultivation tank to be separated from the box body. And the rotating mechanism rotates to drive the breeding tank to pour out fries in the breeding tank. The lifting mechanism is matched with the rotating mechanism, fry in the breeding groove can be automatically poured out, workers can conveniently take out the bred fry, labor intensity is reduced, the fry taking-out efficiency is improved, and operation is convenient.

The invention discloses a special feed for wasp larvae in a process of breeding a standard wasp population. The special feed comprises the following raw materials in parts by weight: 2-4 parts of wasp pupae powder, 1-3 parts of infant amino acid oral liquid and 4-6 parts of minced meat of freshwater fish, locust, rabbit and the like which do not contain fat and hormone. The special feed is processed in a sterile environment, germ disease and virus infection is avoided, the influence of fat and hormone is avoided, the quality of food in the standard population breeding stage is ensured, and when the special feed is tried on 36 standard wasp breeding population bases in Yunnan province in 2023 and 2024, the quality of the wasp is improved. The phenomena that the body surface of larvae turns yellow, red and black, the larvae do not develop, fall from hexagonal honeycomb holes, worker bees die, queen bees abandon the nests and the like are avoided, the success rate of the standard population is 90% or above, the income of standard wasp population breeding farmers and the income of standard wasp population breeding farmers are ensured, and a solid foundation is laid for wasp industry development.

The invention discloses a preparation method of soft minced freshwater fish gel, and belongs to the field of food processing. The preparation method comprises the following steps: S1, pretreating freshwater fish, and rinsing to obtain freshwater fish meat; s2, blending freshwater fish meat until no obvious particles exist, so as to obtain minced freshwater fish paste; s3, adding sodium chloride and xanthan gum into the minced fillet paste of the freshwater fish, and blending to obtain mixed minced fillet paste; and S4, heating and curing the mixed minced fillet paste, and cooling to obtain the freshwater fish soft minced fillet gel. The prepared soft minced freshwater fish gel has low hardness and good water retention capacity, meets the fifth-level standard of the IDDSI framework, not only meets the dietary requirements of special crowds such as dysphagia patients, but also provides multiple choices for development of dysphagia foods; the preparation method is simple, feasible, green, safe and suitable for industrial production.

The present invention discloses an exosome for treating lung injury, a preparation method and application thereof, and relates to the field of biotechnology. The exosome for treating lung injury is derived from aquatic animal cells; the aquatic animal is a freshwater fish; the freshwater fish include: crucian carp, grass carp, black carp, snakehead carp and catfish; the exosome for treating lung injury prepared by the present invention has multiple characteristics such as small size, evasion of phagocytosis, easy penetration of the respiratory tract endothelium layer, etc., can be applied to lung injury, can be used to prepare drugs for lung injury, regulate the lung cell repair mechanism, shorten the process of lung injury repair, and improve the lung injury repair effect.

The utility model discloses a granulator for processing freshwater fish feed, which belongs to the technical field of granulation equipment, and comprises fixed rods fixedly arranged on two sides of a feed inlet, connecting rings rotatably arranged on the fixed rods, placing grooves correspondingly arranged below the connecting rings, protective films stacked in the placing grooves, and the protective films are connected with the connecting rings. One end of the protective film is connected to the bottom of the containing groove, the other end of the protective film is connected to the connecting ring, and when the connecting ring rotates to the other side of the feeding port, the protective film covers the upper portion of the feeding port.

The utility model provides a cutter for removing red meat in raw freshwater fish processing, which solves the problem that the thickness is not easy to control when a manual kitchen cutter is used for cutting the red meat. The cutter comprises a cutter handle, a blade connecting body and two blades, the cutter handle extends in the left-right direction, and the right end of the cutter handle is detachably connected with the left side of the blade connector; the right side of the blade connector is rotationally connected with the left sides of the two blades, the blades are perpendicular to the right side face of the blade connector, the two blades are arranged in a front-back spaced mode, and cutting edge structures are arranged on the edges of the bottoms of the blades. The cutting edge structures at the bottoms of the blades can swing back and forth in a vertical interface to form an inner splayed space structure, so that the width between the cutting edge structures of the two blades can be adjusted; limiting structures are arranged at the connecting positions of the blades and the blade connecting bodies and used for fixing the angles of the blades after swinging, so that the width between the cutting edge structures of the two blades can be fixed.

The invention relates to the technical field of biological extraction, and particularly discloses a method for extracting active polypeptides from freshwater fish, which comprises the following steps: taking fresh freshwater fish bones, cleaning and homogenizing; deionized water containing mandelic acid is added into the homogenate according to the solid-to-liquid ratio of (3-5): 1, the deionized water contains 0.1-0.3 wt% of a mixture of D-mandelic acid and L-mandelic acid, and the weight ratio of the D-mandelic acid to the L-mandelic acid is (52-58): (0.3-0.7); stirring the mixed solution at a constant temperature of 47-52 DEG C, adjusting the pH value to 6.7-7.0, adding a compound enzyme preparation, and carrying out enzymolysis for 4-6 hours; nitrogen is introduced every 20-30 min in the enzymolysis process, and the introduction amount is 15-25 g / h; after enzymolysis is finished, heating enzymatic hydrolysate to 92-95 DEG C, maintaining enzyme deactivation for 8-12 min, adjusting the pH to be neutral, centrifuging for 10-15 min at the temperature of 4-10 DEG C and the speed of 7000-8000 r / min, and taking supernate to obtain active polypeptide; nitrogen is periodically introduced in the enzymolysis process to directionally activate phenolic hydroxyl groups of aromatic amino acids in freshwater fish active polypeptides, so that the phenolic hydroxyl groups become efficient electron donors, and the in-vitro oxidation resistance of the polypeptides is enhanced.

The invention belongs to the technical field of agricultural ecological breeding, and particularly relates to a rice-fish co-culture simulation method for first season rice and ratooning rice. The rice-fish co-culture simulation method comprises the following steps: selecting a rice variety and a freshwater fish variety; a separation net and grass-proof cloth are arranged in an open-air land parcel, and a combined device with a big barrel sleeved with a small barrel is adopted; performing disinfection, seed soaking, germination accelerating and seedling raising on the rice seeds, and transplanting the seedlings into a keg; performing water and fertilizer management and tillering regulation and control after transplanting; fry are put in the booting stage of the rice, feeding, water quality regulation and control and fish disease prevention and control are implemented; applying a bud promoting fertilizer after harvesting in the first season, and promoting the regeneration tiller to germinate after rehydration; harvesting in the yellow ripening stage of ratooning rice, and fishing. By means of the modular design that the small barrels are sleeved with the large barrels, rice is planted in the independent small barrels, ratooning rice management parameters such as the stubble height, the bud promoting fertilizer application amount and the rehydration time point can be controlled in a unified mode, interference caused by soil differences and weather changes under the field condition is eliminated, and it is ensured that the conditions of all treatment units are consistent.

The invention discloses a method for improving the gel characteristics of minced fillet based on chicken breast and soybean protein isolate and a product thereof, and the method comprises the following steps: by taking frozen minced fillet as a raw material, unfreezing, empty blending, chopping with salt, mixing and chopping, adjusting moisture, heating and forming and the like to obtain mixed gel; by adding chicken breast and soybean protein isolate in an optimal proportion in the preparation process of the surimi product, the gel strength, water holding capacity, hardness and other gel characteristics of the surimi product are remarkably improved, meanwhile, the taste characteristics and sensory quality of surimi gel are remarkably improved, and the effect of improving the quality of the surimi product to the maximum extent is achieved; the utilization rate of the freshwater minced fish is favorably improved, and the market consumption and industrial production of related minced fish products are expanded; the method disclosed by the invention is simple to operate, and the product improved by the chicken breast and the soybean protein isolate is good in gel quality and has a wide application prospect.

The utility model relates to the technical field of freshwater fish culture, and particularly discloses a fish hatching device which comprises a base, a hatching box is installed on the base, and a water collecting tank is arranged on the periphery of the hatching box. The water spraying assembly is arranged at the top of the incubator and comprises a supporting frame connected with the incubator, and the driving motor is installed on the surface of the supporting frame; the water spraying assembly comprises a water spraying pipe and a supporting seat, the water spraying pipe is fixedly connected with an output shaft of the driving motor, a water inlet end is arranged on the surface of the water spraying pipe, one end of the supporting seat is rotationally connected with the water inlet end, and the other end of the supporting seat is fixedly connected with an external water pipe. The conical part is arranged, so that sewage can be conveniently discharged when the interior of the barrel is cleaned before roe hatching, fries can be conveniently put after roe hatching, and when a water source in the hatching box is continuously increased, the water source overflows from the top of the cylinder part, so that the flowability of the water source in the hatching box is kept, and the roe hatching rate is effectively increased.

A fish head removing machine comprises a machine frame, a fish body head removing platform mechanism is installed on one side of the machine frame and used for supporting and limiting fish bodies, a driving mechanism is installed at the top of the machine frame, a cutter fixing seat is installed at the bottom of the driving mechanism, and a cutter is installed on the cutter fixing seat. A head removing cutter matched with the fish body head removing platform mechanism is mounted at the bottom of the cutter fixing seat; when the fish head removing machine works, the curved-surface arc-shaped cutting edge knife cuts off a fish head along a gill cover, waste of fish meat can be avoided to the greatest extent, the fish head removing machine is suitable for fishes with large gill covers of fish bodies, when the fish head removing machine works, the straight V-shaped cutting edge knife is a straight line and is suitable for fishes with small gill covers of fish bodies, head removing processing of freshwater fish bodies is achieved, and the fish head removing efficiency is improved. The fish head removing device is simple in structure, convenient to operate, safe, time-saving, labor-saving and high in processing efficiency, fish meat can be reserved on a fish body as far as possible, and various fish bones on the fish head part are avoided.