919results about "Fishing" patented technology

The invention discloses an underwater LED fish gathering lamp control method based on a light field scattering model, and the method comprises the following steps: obtaining water optical characteristic parameters and environmental parameters of a target water area in real time, and building an underwater light field scattering model through employing a radiation transfer equation in combination with a Monte Carlo simulation method; with improvement of target fish school gathering efficiency and reduction of energy consumption as optimization objectives, environment parameters are taken as constraint conditions, illumination effects under different LED parameter combinations are simulated through a light field scattering model, and LED control parameters with optimal comprehensive performance are determined; a control instruction is generated according to the LED control parameters, and the working state of each LED unit is adjusted; meanwhile, fish school gathering data and current change values of water temperature, salinity and turbidity are monitored in real time and fed back to the light field scattering model for parameter correction, and closed-loop control is formed. The underwater LED fish gathering lamp control method solves the technical problems of low light field distribution prediction precision, insufficient fish school visual matching performance, poor environmental adaptability and unbalanced energy consumption optimization in the existing underwater LED fish gathering lamp control method.

The utility model discloses a mandarin fish domestication feeding device which comprises a feeding pipeline and a bait temporary storage tank arranged at the upper end of the feeding pipeline, a feeding hopper is arranged at the upper end of the bait temporary storage tank, and the feeding pipeline comprises a vertical pipe with the upper end in butt joint with the bait temporary storage tank and a horizontal discharging pipe in butt joint with the bottom of the vertical pipe. One end of the horizontal discharge pipe is connected with a high-pressure water source or air source; the vertical pipe is of a multi-section telescopic rod structure. A cathode ring piece and an anode ring piece are arranged at the two ends of the vertical pipe, and the cathode ring piece and the anode ring piece are connected with a pulse generator used for outputting pulse signals and a pulse power amplifier used for controlling output voltage through wires. The fish feeding device can achieve feeding at different depths, can feed live fish, dead fish and feed according to different proportions, is simple and convenient to operate, greatly reduces the workload of manual feeding, and can be widely applied to the field of bait feeding.

The invention relates to the technical field of fishery water conservancy and hydropower engineering, and discloses a floating type fish collecting device for water conservancy and hydropower engineering, which comprises a floating platform, a net cage fixedly connected to the bottom of the floating platform, a support frame fixedly connected with the net cage and arranged on the bottom of the floating platform, and a plurality of groups of fish inlets arranged on the net cage; the fish luring mechanism is arranged on the floating platform, a feeding assembly is arranged on the side, close to the net cage, of the fish luring mechanism, a bait bag is connected to the feeding assembly, and the fish luring mechanism drives the bait bag to evenly rotate in the net cage through the feeding assembly; the inner gear ring is arranged on the outer wall of the floating platform, a linkage mechanism connected with the inner gear ring is arranged on the floating platform, and a fish collecting assembly is arranged on the side, close to the net cage, of the inner gear ring; according to the device, the diffusion effect of bait can be improved, waste of the bait is reduced, meanwhile, the trapping range of fishes is expanded, vigilance of the fishes is reduced, and the fish trapping effect of the device is improved.

A speargun and speargun components are disclosed allowing for rapid reloading of the spear, and retaining the spear in the gun with an open track and retention mechanism. A spear retention mechanism is also disclosed, which may be integral with the speargun or interchangeable for different size spears. A phospholuminescent sighting track on one or both sides of the top of the speargun is also disclosed whereby the illuminated portion of the speargun provides a visual sight for a spear once inserted into the track. An interchangeable system of speargun retention mechanisms is also provided.

The invention discloses an integrated mariculture net cage, and relates to the field of mariculture, the integrated mariculture net cage comprises fixing frames at two ends, a plurality of annular supporting rods arranged between the two fixing frames at equal intervals, a plurality of supporting rods fixed between the fixing frames and the annular supporting rods, and nettings fixedly wrapping the fixing frames; wherein a feeding mechanism and a floater energy supply mechanism are fixed to one supporting rod, an anchoring mechanism fixed to the supporting rod is arranged relative to the floater energy supply mechanism, a guide rod is rotationally connected between the two fixing frames, the end, close to one fixing frame, of the guide rod is connected with a first motor, and the outer portion of the guide rod is in threaded connection with a movable fish driving mechanism. Wherein a fish suction pipeline extending into the net is arranged on the side face of the fixing frame away from the first motor, the end, away from the fixing frame, of the fish suction pipeline is connected with a fish suction pump, and a rotary fish driving mechanism fixed to the supporting rod is arranged at the ends of the fish suction pipeline and the fixing frame. Automatic fishing operation can be achieved, the internal conditions of fish schools are monitored in real time, the labor cost is reduced, and the breeding efficiency is improved.

The invention discloses a deep-sea lamplight trapping type continuous pumping fishing device and method, and relates to the field of marine fishery fishing, and the deep-sea lamplight trapping type continuous pumping fishing device comprises a sonar detection system, a lamplight trapping system, a negative pressure pumping unit, a flexible conveying system and a control system which are mounted on a ship; the sonar detection system comprises a sonar detector; the lamplight trapping system comprises a plurality of fish luring lamps which are put underwater at a certain depth; the negative pressure pumping unit comprises a fish pump mounted on the ship; the flexible conveying system comprises a winch arranged on the ship, a fish suction hose is wound on the winch, one end of the fish suction hose is connected with the negative pressure pumping unit, and a fish suction protective cover is arranged at one end of the fish suction hose; the control system comprises a lifting frame installed on the ship, a plurality of traction ropes are connected to the lifting frame, and a plurality of lifting winches used for controlling the traction ropes to stretch out and draw back are arranged on the lifting frame. According to the method, target species are caught better and accurately, damage and waste to fishes are reduced, and the integrity of caught fishes is improved.

The invention provides a fish capturing device, and relates to the field of fish capturing technologies. The invention provides a fish capturing device. The fish capturing device comprises a fish catching fence, at least one turbulent flow partition plate and a fish guiding channel. The fish guiding channel is connected with the fish catching fence, the fish guiding channel and the fish catching fence define a fish collecting area, the fish collecting area is used for collecting fishes in a centralized mode through the fish inlet, the turbulent flow partition plate is arranged in the fish collecting area, and the turbulent flow partition plate is configured to rotate relative to the fish catching fence and the fish guiding channel so as to stir water flow in the fish collecting area. Therefore, living environments suitable for different types of fishes can be created. By means of the arrangement mode, the habitats of various fishes can be simulated, the applicability of the fish capturing device is improved, and meanwhile damage to the fishes is reduced.

The utility model relates to the technical field of ecological environment detection, in particular to an underwater plankton sampling device which comprises a main body, a sampling driving component is arranged in the main body, and a control collecting component is fixedly connected in the main body; according to the utility model, the sampling depth can be accurately controlled by utilizing the depth sensor, in order to meet different research requirements, the tube wheel is driven by the motor to wind the sinking tube, and the automatic control driving mechanism can quickly complete sampling and can drive the sampling barrel to move up and down in water to realize sampling at different depths, so that the sampling efficiency is improved. The microprocessor is used for controlling the operation of the depth control mechanism and the driving mechanism, automatic sampling is realized, the inner wall of the sampling barrel is smooth, attachment and damage of plankton in the sampling process are avoided, automatic sampling is realized through the control unit, the operation is simple, and the use is easy; the sample collection container can be used for storing sampled plankton samples, so that the samples are prevented from being polluted.

The invention discloses a breeding cabin equipment system, a cabin transferring method and a trapping method, and belongs to the technical field of breeding equipment. The system comprises a cabin body, and a culture cabin, a pumping device, a cabin transfer channel and a cabin access which are arranged in the cabin body. The cabin transferring method comprises the step of transferring fish from the culture cabin to another culture cabin through the cabin transferring channel. According to the collecting and catching method, fish in the cabin rotating channel is collected and caught through the collecting and discharging well. Water level differences among different culture cabins are formed by controlling water levels of different culture cabins, net racks at the bottoms of the culture cabins can be intelligently controlled to ascend and descend through a program, devices such as cabin rotating baffles and cabin opening cover plates are selectively opened and closed, and a fish-water mixture flows from a high-water-level culture cabin to a low-water-level culture cabin through a live fish cabin rotating structure. And quick intelligent cabin-transferring culture without damage of live fishes is realized. By controlling the water body, aquatic products can be transferred in different cabins, damage to the aquatic products caused by an existing transferring tool is avoided, operation is convenient, and rapid and intelligent cabin-transferring cultivation is achieved.

The invention relates to the technical field of underwater optical cables, and discloses an offshore wind power submarine cable scouring protection device which comprises a wind power body, a connecting body connected with the water bottom is arranged on the surface of the wind power body, and a cable body is connected to the surface of the wind power body; when the cable body is laid, the cable body can be connected with the ground under the action of the connecting shell, impact of water can be prevented under the action of the protection mechanism, and then the protection capacity of the connecting shell on the cable body is improved. In daily use of the connecting shell, crabs can be caught under the action of the catching mechanism, so that the crabs are located in the connecting shell, the crabs prey on algae on the surface of the cable body, the possibility that the algae survive on the surface of the cable body is reduced, and under driving of the protection mechanism, the crabs are prevented from being damaged. And the driving mechanism and the oxygen supply mechanism supply oxygen to the connecting shell, so that the survivability of the crabs is improved.

The invention provides a hydraulic automatic fishway device, and relates to the technical field of hydraulic engineering, the hydraulic automatic fishway device comprises an arc fishway track, a multifunctional structure is rotatably mounted on the outer side of the arc fishway track, the multifunctional structure comprises a synchronous belt, a plurality of fish collecting plates are arranged on the surface of the synchronous belt, and each fish collecting plate is clamped with the synchronous belt; a fish collecting groove is formed in each fish collecting plate, a fish luring warm-color lamp strip is arranged in each fish collecting groove, through a multifunctional structure, when water flow impacts the water turbine from bottom to top, the water turbine rotates under the radial force of the water flow, so that radial force is generated on the fixing rod to rotate in the fixing frame, and meanwhile, the water flow impacts the water turbine through the water flow; the rotation of the fixing rod enables the driving bevel gear to rotate and to be engaged with the driven bevel gear, so that the driven bevel gear rotates, and then the rotating cross rod is controlled to drive the first gear to rotate and to be engaged with the inner tooth set, so that the synchronous belt can drive the fish collecting plate and the fish collecting groove to rotate, fish at the fishway inlet is brought to the upstream, and migration of the fish is helped.

The sand rake of the present invention includes: a filter body, having an open filtering space and a plurality of filtering holes distributed across all sides thereof, a front side of the filter body being formed as an inclined surface and having a top edge with a plurality of teeth, while a bottom side of the filter body being formed as a flat surface; a support component, disposed in the filtering space of the filter body; and a handle, disposed at a rear side of the filter body. Accordingly, by using the specially-structured filter body of the sand rake, it replaces the user's hand in collecting shellfish organisms, increasing the harvest yield and enhancing safety during use.

The invention discloses a sustainable luring ecological floating island system which is characterized in that fish schools in an open type water area are induced to enter a water area where an ecological floating island is located through planned enhancement releasing feeding and going out, and the fish schools in the water area where the ecological floating island is located are captured through a fishing device and put into a besieging space. The method can ensure that the species and number of aquatic organisms in an ecological floating island ecological system are kept relatively stable within a certain time, conforms to the development concept of sustainable fishery, can enable fishing and fishing pleasure and ecological environment protection to cooperatively develop, can ensure that the fishing and fishing pleasure can be continuously and healthily carried out for a long time, and has a wide application prospect. Therefore, a sustainable and stable fishing place is provided for fishing enthusiasts through a sustainable inducing and breeding combined mode, and meanwhile protection and recovery of a water area ecological system are considered; the invention further discloses a sustainable fishing method of the sustainable luring ecological floating island system, and by means of a sustainable luring combination mode of the ecological floating island system, catching and fishing activities can be continuously carried out.

An aquaculture system can include an aquafarm with one or more aquatic pods of aquatic organisms and a remote device to manage the aquafarm. An aquatic pod may be associated with an aquatic structure with a buoyancy system and a control device to automatically perform daily farming functions. The aquatic structure may include an enclosure to hold the aquatic organisms. The control device may be configured to use a smart buoyancy assistant to control the buoyancy system and to determine the farming task to perform in response to environmental stimuli. The remote device can receive data representing crop metrics, harvest results, and sensor data. The remote device can aggregate data from multiple aquatic pods and correlate the data to generate aquaculture models to improve the harvest results. The remote device can generate overview and maintenance reports for the aquafarm.

The present application provides a method and system for monitoring sampling of aquatic biodiversity, which monitors the target waters, divides multiple sampling sub-areas according to water monitoring data; collects samples of aquatic organisms in the sampling sub-areas to obtain a biological sample set; extracts multiple sample clusters of the biological sample set based on the sample characteristics of the biological samples in the biological sample set, and performs diversity assessment on all sample clusters to obtain diversity indicators of aquatic biological communities in the sampling sub-areas; determines the relative density of each sample cluster, and determines the heterogeneity index of each sample cluster in spatial distribution according to all relative densities and water characteristics of the sampling sub-areas; determines the optimization degree of the sampling sub-areas based on all heterogeneity indices and diversity indices, and then determines the target sampling area for aquatic biodiversity monitoring according to all optimization degrees. The scheme of the present application can realize the accurate selection of sampling areas with high representativeness and high analytical value.

The utility model discloses a liftable fish collecting and luring device and a fish resource investigation system, the liftable fish collecting and luring device comprises a fish collecting cage, a fish luring lamp is arranged in an inner cavity of the fish collecting cage, the fish collecting cage is provided with a fish collecting port and a fish outlet, the fish outlet is provided with a fish outlet opening and closing mechanism, and the fish outlet opening and closing mechanism is provided with a fish luring lamp. The top of the fish collecting cage is provided with at least one movable pulley block used for being matched with a steel wire rope of the lifting mechanism, each movable pulley block comprises at least one movable pulley, the liftable fish collecting and luring device further comprises fixed pulleys in one-to-one correspondence with the movable pulleys, and the lifting mechanism comprises an electric hoist. Steel wire ropes of the electric hoists sequentially penetrate through the upper ends of the corresponding fixed pulleys and the lower ends of the movable pulleys and then are connected with the installation frame, and the fixed pulleys are installed on the installation frame. According to the utility model, aquatic ecology investigation work of a target water area can be efficiently collected in real time.

A gateway for use in a scallop tray comprises a passageway 1 having an external opening at one end and an internal opening at an opposing end. A hinge 11 is included adjacent to an upper periphery 9 of the passageway and a gate in which each of a plurality of independently-movable arms 17 are pivotable about the hinge between a closed position (in which the arm extends across the passageway) and a deflected position (in which it is spaced from the lower periphery 3 of the passageway.) To enter the gate, a scallop needs only to push against at least one of the arms, moving it into its deflected position. A scallop trap is provided comprising a chamber and the gateway, as well as a method of retaining scallops within a scallop trap using the gate.

The invention discloses an ROV system carrying a multi-degree-of-freedom mechanical arm and a using method, the ROV system comprises the multi-degree-of-freedom mechanical arm, a collecting net cage, a plurality of underwater cameras, a plurality of LED lamps, a sonar and a plurality of underwater sensors, and by carrying the multi-degree-of-freedom mechanical arm, the flexibility of the mechanical arm is improved; (2) a plurality of underwater cameras are installed on the two sides of an ROV to observe the environment, installed near a mechanical arm joint to observe the grabbing condition and installed on a catching cage to observe the collection condition of marine products; (3) a leakage-proof catching cage is specially designed, so that the caught marine products are prevented from leaking; 4) a biological recognition algorithm is provided, target species and non-target organisms are distinguished based on AI image processing, and the fishing efficiency is improved; (5) a sonar and a near-field sensor are arranged, and ROV underwater obstacle avoidance and terrain adaptation are achieved; and (6) ROV bottom-sitting operation is provided, different from a traditional ROV design that the buoyancy is slightly larger than the weight, the design gravity of the ROV is slightly larger than the buoyancy, so that the ROV can carry out bottom-sitting operation in a free state, and interference of a propeller to the environment is reduced.

The embodiment of the invention provides a device and a method for intelligent identification tracking and state judgment of fish organisms, which are used for collecting and identifying fish school information of a water area to be detected, a tracking identification platform, and a water area processing assembly, a bait throwing assembly and an identification assembly which are respectively arranged on the tracking identification platform, the tracking identification platform is arranged on the bank of a water area to be detected; the bait throwing assembly is used for throwing bait into the water area to be detected so as to attract fish schools; the water area treatment assembly is used for being arranged in a water area to be detected to perform water flow disturbance on the water area; and the identification assembly is used for collecting a fish school video of the water area to be detected and identifying the type and growth state information of each fish in the fish school video. According to the device and the method, a large amount of original data is obtained through long-time identification and tracking, and the fish type and fish state information in the water area to be detected is efficiently obtained based on the identification assembly.

The net cage assembly comprises a stationary net wall (8, fig 3) and a movable, vertical crowding net wall (5, fig 2). A crowding net cage 2 is located between the stationary vertical removable net wa

The utility model discloses an underwater fish gathering lamp which comprises a radiator, the radiator is a hollow sectional material radiator, lamp beads are attached to the outer surface of the radiator to form a light source plate, a glass tube is arranged outside the radiator and the light source plate in a sleeved mode, and a closed cavity is formed between the outer wall of the radiator and the inner wall of the glass tube. The hollow part of the profile radiator is a radiating channel, two ends of the radiator and two ends of the glass tube are connected through elastic rubber rings and end covers in a sealing mode, and gaps are filled with pouring sealants. According to the underwater fish gathering lamp, the hollow sectional material radiator is adopted, after water flow enters the hollow radiating channel and is heated, the density of the water flow becomes light and rises, the chimney effect similar to that in air is formed, water resistance can be reduced, and rapid heat exchange can be achieved.

This invention discloses a fishway illumination-based fish-attracting experimental device, belonging to the field of fish-attracting experimental technology. It includes: an experimental water tank, positioned above a reservoir, divided into an upstream, midstream, and downstream section, with an adaptation zone in the downstream section; a support frame erected above the midstream section, covered with a black cloth; and an illumination mechanism located on the upper wall of the midstream section, comprising LED lights and connecting components. Through the structural design of the connecting components, this invention allows for multi-dimensional flexible adjustment of the LED lights' horizontal position, illumination angle, and vertical height, breaking the limitations of fixed illumination modes in traditional experimental devices. The position and angle of the illumination can be adjusted according to experimental needs, and the adjustment operation is simple and convenient. It enables multi-parameter illumination research, allowing for quantitative study of the impact of different illumination conditions on fish migration behavior, meeting the needs of different experimental scenarios, and providing support for personalized fish-attracting research.

The invention discloses a soft-shell crab molting state monitoring and automatic capturing device, and particularly relates to the technical field of soft-shell crab molting state monitoring and automatic capturing, and the soft-shell crab molting state monitoring and automatic capturing device comprises a monitoring module, an environment self-adaption module, a capturing module, a control module and a remote monitoring module. According to the soft-shell crab molting state monitoring and automatic capturing device, through cooperative application of multi-sensor data fusion and a deep learning algorithm, full-process intelligent monitoring and automatic capturing of the soft-shell crab molting state are achieved; by combining technical means such as environment self-adaptive adjustment, wireless low-power-consumption communication, large-scale multi-pond linkage and night weak light optimization, efficient, stable and safe operation of the system in various breeding scenes is guaranteed, and meanwhile, modular software and hardware design and a distributed cloud edge collaborative architecture have a good application prospect. The device has excellent expansibility, maintenance convenience and intelligent operation and maintenance capability, and the automation degree and production benefits of soft-shell crab culture are greatly improved.

The utility model relates to a water fry conveying system which comprises a conveying device, a breeding device and a connecting assembly, the conveying device comprises a fish suction pump and a fish outlet, a fish suction pump pipeline is connected to the fish outlet, the conveying device is used for conveying fries, the fish suction pump is used for extracting the fries located in the conveying device, and the breeding device comprises a fish inlet. The breeding device is used for breeding fish fries, the connecting assembly comprises a conveying part and flexible joints, the two opposite ends of the conveying part are connected to the fish inlet and the fish outlet through the flexible joints correspondingly, and the conveying part is used for conveying the fish fries to the breeding device from the conveying device through the connecting assembly. The technical scheme provided by the utility model can be suitable for severe environments such as overwater stormy waves, the environmental adaptability is better, compared with a traditional fry putting mode, the putting time can be saved, damage to fries can be reduced, and the use reliability and safety are higher.

A flow generation device (100; 200; 300; 400; 500) for flowing liquid and biomass (101), the flow generation device comprises a first rotor (103; 303; 403; 503) having an axis of rotation (A) and an outer radius (R), a housing (104; 304; 404; 504) encompassing the first rotor and forming a closed liquid volume with an inlet (105) and an outlet (106) for liquid and biomass, the first rotor adapted to provide a circulating motive liquid flow (107; 507) within the housing, a liquid and biomass channel (109; 209; 309; 409; 509) separate from the housing and extending within the housing from the inlet to the outlet, the liquid and biomass channel comprising openings (111; 211; 511) for the circulating motive liquid flow to flow the liquid and biomass inside the liquid and biomass channel from the inlet to the outlet.

The LED lamp comprises a lamp shell, a light source, a light-transmitting cover, a pipe fitting and a side cover, the lamp shell is provided with a light-emitting end, the light-emitting end is provided with a plurality of connected light-emitting faces, included angles are formed between the light-emitting faces to enlarge the light-emitting range of a main light area, the light source is installed on the light-emitting faces, and the light-transmitting cover is installed on the light-emitting faces. The light-transmitting cover is mounted at the light-emitting end to cover the light source on the light-emitting surface; the lamp shell is provided with a through cavity penetrating through the lamp shell, the pipe fitting is communicated with the through cavity, and liquid is guided to flow through the through cavity through the pipe fitting to accelerate heat dissipation of the lamp shell. According to the structure, the lamp shell and the back shell are made of magnesium alloy, and the cavities are formed in the lamp shell and the back shell, so that the overall weight of the lamp is reduced, and the load in use is effectively reduced. The through cavity is formed in the lamp shell, the pipe body is inserted into the through cavity, the water pump is connected with the pipe body, water flow is guided into the through cavity of the lamp shell through the water pump, the water flow penetrates through the through cavity from one side of the lamp shell and then is discharged from the other side of the lamp shell, the heat dissipation efficiency is improved, the lamp efficiency can be improved, and the power can be better improved under the same size.

The invention discloses a fish collecting device based on negative pressure non-contact fish suction, a main body is a hollow fish collecting tank body, and the fish collecting device is provided with functional pipelines such as a fish suction pipeline, a fish discharge pipeline, a vent valve, an oxygen valve, a high-low drain pipe and the like, and pressure and liquid level sensors. The base is made of stainless steel, a transparent window is arranged in the middle of the base, and an access hole is formed in the top of the base. The control host is connected with the valves, the water pump and the sensor to achieve automatic control. During working, water is pumped into the tank body firstly, then part of water is pumped out to form negative pressure, fish is sucked through the negative pressure, inlet and outlet flow is kept consistent during fish suction so as to maintain constant pressure in the tank, and temporary rearing or fish discharging can be achieved. The device avoids mechanical damage to fish bodies, and is relatively simple in structure, low in cost and suitable for catching and conveying fishes in large-scale facility culture in deep and far sea.

A system for underwater hunting contains a plurality of components which allow for customization of the speargun based on the user's needs and the conditions where a user is hunting. By allowing rapid additions or removals of certain components, the invention allow the user to easily modify the firing characteristics of the speargun, and thus target a wider range of prey across a wider range of environmental conditions than those designs currently available in the prior art.

Tunnel gates for crab pots, crab pots including the same, and related methods. The tunnel gates include a gate frame that defines an entry opening. The tunnel gates also include a trigger mount, which is positioned within an upper gate region of the tunnel gate, and a plurality of trigger bars, which are pivotally attached to the trigger mount and extend toward a lower gate region of the tunnel gate. The plurality of trigger bars is configured to rotate, relative to the gate frame, about a rotation axis. The tunnel gates also include a trigger stop positioned within the upper gate region. The trigger stop is configured to restrict rotation of the plurality of trigger bars about the rotation axis between an open orientation and a closed orientation. The crab pots include the tunnel gates. The methods include methods of utilizing the tunnel gates.

The adult fish catching device comprises a flat plate and a supporting rod, the supporting rod is longitudinally welded to the bottom of the flat plate, the supporting rod is sleeved with a hollow pipe, the upper portion of the front end of the hollow pipe is in threaded connection with a first bolt, and a movable base is welded to the bottom end of the hollow pipe; according to the adult fish catching device of the culture net cage, the hanging plate is welded to the center of the bottom of the flat plate, the longitudinal electric wheel and the transverse electric wheel which form a 90-degree vertical state are attached to the outer walls of the two sides of the net cage, the movable base makes contact with the ground, and the net cage is fixed through the movable base; the distance between the fine-hole net bag is increased to a certain distance vice versa, the distance between the supporting rod and the hollow pipe is adjusted through the first bolt according to the height of the net cage, the flat plate and the fishing mechanism can be moved along the net cage to conduct catching, and the problem that moving is inconvenient is solved.