Indoor small water body culture system and culture method for juvenile conch

Abstract

The present invention discloses an indoor small water body breeding system and breeding method for juvenile conchs, belonging to the field of conch breeding technology. An indoor small water body breeding system for juvenile conchs comprises a breeding main box, a breeding module and a water treatment module arranged in the breeding main box; a plurality of breeding matrix layers are arranged inside the breeding module; the breeding module and the water treatment module are separated by a partition with hollow holes; the water treatment module is configured to absorb organic matter in the breeding module through a hollow hole group and discharge it out of the breeding main box. An indoor small water body breeding method for juvenile conchs comprises drying bait pellets; placing the bait pellets in a feeding tray for feeding; and maintaining the breeding matrix. The present invention can realize the factory breeding of conchs in small water bodies, effectively treat suspended organic matter and floating bait such as colloidal excrement and mucus, and has low investment cost and good conch breeding effect.

Description

Technical Field

[0001] The invention relates to the field of conch farming, and in particular to an indoor small water body farming system and a farming method for conch larvae. Background Art

[0002] The conch mainly lives in warm temperate waters in northern China, Japan, South Korea and other places. It is a large carnivorous snail. It is rich in nutrition and has delicious meat. It is widely loved by consumers and is an important economic snail in the northern coastal areas of my country. In recent years, with the destruction of habitats and overfishing and other unsuitable production activities, the amount of wild resources has been decreasing. The artificial breeding and ecological adaptability research of the conch has been widely carried out.

[0003] In daily practice, the inventors found that the existing technical solutions have the following problems:

[0004] Under current breeding test conditions, snails are mostly placed in natural sea areas or caged in outdoor ponds. However, breeding in sea areas or outdoor ponds has problems such as large changes in water temperature and water environment, poor environmental controllability, and the growth of snails is easily affected by interfering organisms. Choosing a breeding workshop under full artificial control as the breeding site can achieve a controllable breeding environment and avoid interfering organisms. However, snails have a slow feeding activity, and the bait easily floats up and diffuses, deteriorating the water quality. At the same time, snails secrete a large amount of mucus on their abdominal feet to help them crawl, and suspended organic matter such as gelatinous excrement and mucus is difficult to clean. The above situation leads to a slow indoor breeding process for snails.

[0005] In view of this, it is necessary to provide a new technical solution to solve the above problems. Summary of the invention

[0006] In order to solve the above-mentioned technical problems, the present application provides an indoor small-water body breeding system and breeding method for juvenile snails, which can realize the factory-scale breeding of snails in small water bodies, effectively treat suspended organic matter such as colloidal excrement and mucus and floating bait, and has low investment cost and good snail breeding effect.

[0007] A small water body indoor breeding system for snail larvae, comprising a breeding main box, a breeding module and a water treatment module arranged in the breeding main box; the breeding module and the water treatment module are separated by a hollow partition; the breeding module is a bed-type structure, comprising a hollow bottom plate arranged at a certain distance from the bottom surface of the breeding main box; a plurality of breeding matrix layers are arranged on the upper surface of the bottom plate; a plurality of hollow hole groups with hollow holes are arranged on the partition; the number of the breeding matrix layers is the same as that of the hollow hole groups, and the breeding matrix layers at the same horizontal height correspond to the hollow hole groups; the water treatment module comprises a bottom suction pump; the water treatment module is configured to suck organic matter in the breeding module through the hollow hole group and discharge it out of the breeding main box.

[0008] Preferably, the hollow holes in the same hollow hole group have the same diameter, and the spacing between adjacent hollow holes is 1.5 times the diameter of the hollow holes; the maximum diameter of the hollow holes in the hollow hole group at the same horizontal height is smaller than the minimum particle size of the aquaculture matrix in the aquaculture matrix layer.

[0009] Preferably, the particle size of the aquaculture matrix in the lower aquaculture matrix layer is larger than the particle size of the aquaculture matrix in the upper aquaculture matrix layer.

[0010] Preferably, the aquaculture matrix layer includes a first aquaculture matrix layer, a second aquaculture matrix layer, a third aquaculture matrix layer and a fourth aquaculture matrix layer from bottom to top; the first aquaculture matrix layer is water-polished pebbles, and the particle size range of the water-polished pebbles is 3 to 6 cm; the second aquaculture matrix layer is submerged large ceramsite, and the particle size range of the submerged large ceramsite is 2 to 3 cm; the third aquaculture matrix layer is submerged small ceramsite, and the particle size range of the submerged small ceramsite is 0.3 to 0.5 mm; the fourth aquaculture matrix layer is oyster shell powder after high-temperature burning and crushing treatment, and the particle size of the oyster shell powder is 150 μm to 300 μm.

[0011] Preferably, the partition includes a partition body; the partition body includes a first hollow hole group, a second hollow hole group, a third hollow hole group and a fourth hollow hole group from bottom to top.

[0012] Preferably, the water treatment module also includes a filter and a drip-type water replenisher, a protein separator with a needle brush pump, and a water fairy with filter cotton; the drip-type water replenisher is filled with fresh water; in a non-matrix maintenance state, the filter inlet end is connected to the pump outlet of the bottom suction pump, and the bottom suction pump, the needle brush pump and the filter cotton are arranged in sequence from low to high; in a matrix maintenance state, the bottom suction pump is fixed to the partition, and the pump inlet of the bottom suction pump corresponds to the position of the hollow hole group.

[0013] According to another aspect of the present application, a method for culturing juvenile conch shells in a small water body indoor is also provided, wherein the culturing is performed using the juvenile conch shells in a small water body indoor culturing system, comprising:

[0014] Use dead marine organisms to make dried bait pellets;

[0015] In the evening of each day, 20% of the total weight of the snails are taken and placed in the feeding tray for feeding;

[0016] Regularly maintain the culture substrate in the culture substrate layer.

[0017] Preferably, the process of using dead marine organisms to make dried bait pellets comprises:

[0018] Make dead marine organisms into chyme;

[0019] Let the prepared chyme stand on a sieve for 30 to 50 minutes to drain some of the water.

[0020] The drained chyme, oyster shell powder and 5% sodium alginate solution are mixed in a mass ratio of 2:6:1, and stirred until completely mixed and uniform to prepare a mixture;

[0021] The mixture is extracted by a peristaltic pump, slowly dropped into a 1.5% calcium chloride solution, and allowed to stand for 2 hours to prepare wet bait particles;

[0022] Take out the prepared wet bait particles, drain the water, and put them into an oven to dry them into dry bait balls.

[0023] Preferably, the dead marine organism is any one or more of frozen or fresh-chilled fish, molluscs and small arthropods.

[0024] Preferably, the periodic maintenance of the culture substrate in the culture substrate layer comprises:

[0025] Take out the components except the bottom suction pump in the water treatment module, and keep the bottom suction pump and the corresponding pipelines of the bottom suction pump;

[0026] The bottom suction pump is fixed to the partition between the aquaculture module and the water treatment module, and the pump inlet is aligned with the hollow hole of the partition to suck out the organic matter adsorbed on the surface of the aquaculture matrix in the aquaculture matrix layer; while the wastewater is discharged, an equal amount of seawater of the same temperature and salinity is added;

[0027] According to the color changes of the oyster shell powder in the surface culture substrate layer, part of the oyster shell powder was removed with a straw and replaced.

[0028] Compared with the prior art, this application has at least the following beneficial effects:

[0029] The invention realizes the factory-based breeding of snails in small water bodies, restores the natural living environment of snails to the greatest extent, and reduces the stress of artificial breeding management operations on breeding organisms. At the same time, it effectively avoids the replacement of seawater in indoor breeding environments of snails, solves the problem that the snails' slow feeding leads to the easy floating and diffusion of food, which deteriorates the water quality, and the difficulty in cleaning the suspended organic matter such as the snails' gelatinous excrement and mucus, and improves the effect of factory-based breeding of snails. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0031] Figure 1 It is a schematic diagram of the structure of the indoor small water body culture system for larval conchs of the present invention;

[0032] Figure 2 It is a schematic diagram of the structure of the partition in the indoor small water body breeding system for juvenile conch shells of the present invention.

[0033] The above drawings include the following reference numerals:

[0034] 100. Main aquaculture box, 10. Water treatment module, 20. Aquaculture module, 30. Partition, 40. Support, 21. Bottom plate, 22. First aquaculture matrix layer, 23. Second aquaculture matrix layer, 24. Third aquaculture matrix layer, 25. Fourth aquaculture matrix layer, 31. Hollow hole, 32. Partition body, 33. First hollow hole group, 34. Second hollow hole group, 35. Third hollow hole group, 36. Fourth hollow hole group, 37. Support column. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0036] like Figure 1 and Figure 2 As shown, a small water body indoor aquaculture system for snail larvae includes a main aquaculture box 100 and a water treatment module 10 and a breeding module 20 arranged in the main aquaculture box 100. The breeding module 20 is separated from the water treatment module 10 by a hollow partition 30. The main aquaculture box 100 is preferably a plastic or glass box with a total volume of 60 to 100L, and the ratio of the breeding module 20 to the water treatment module 10 is about 4:1. The width of the partition 30 is consistent with the width of the inner cavity of the main aquaculture box 100, and its upper edge is flush with the upper edge of the main aquaculture box 100, and it is fixedly connected to the inner cavity of the main aquaculture box 100 in the width direction. The partition 30 is preferably a hard plate of a transparent material, such as a glass plate or a plastic plate, and the thickness of the partition 30 is preferably 6mm.

[0037] In some embodiments of the present invention, the four vertical corners of the inner wall of the main breeding box 100 are arc-shaped corners.

[0038] The water treatment module 10 includes a bottom suction pump, a filter, a drip water replenisher, a protein separator with a needle brush pump, and a water fairy with filter cotton. The drip water replenisher is filled with fresh water to supplement the water lost in the main breeding box 100 due to evaporation. In the non-matrix maintenance state, the inlet end of the filter is connected to the pump outlet of the bottom suction pump, and the bottom suction pump, the needle brush pump and the filter cotton are arranged in sequence from low to high. In the matrix maintenance state, the bottom suction pump is fixed on the partition 30, and the pump inlet of the bottom suction pump corresponds to the position of the hollow hole group, so that the water treatment module 10 is configured to suck away the organic matter in the breeding module 20 through the hollow hole group and discharge it outside the breeding main box 100. The water treatment module 10 does not require a temperature control device, and the temperature regulation in the breeding main box 100 can be achieved by adjusting the indoor air conditioner.

[0039] Preferably, the filter is a small top filter with a top filter box, and the top filter box and the filtered water outlet are located in the breeding module 20 area.

[0040] Preferably, the top filter box includes three layers of filter materials, which are biochemical cotton, activated carbon and biochemical ring from top to bottom.

[0041] The breeding module 20 is a bed-type structure, including a hollow bottom plate 21 arranged at a certain distance from the bottom surface of the breeding main box 100, and a plurality of breeding matrix layers are arranged on the upper surface of the bottom plate 21. Each layer of the breeding matrix layer contains different types of breeding matrix, and the particle size of the breeding matrix in the lower breeding matrix layer is larger than that of the upper breeding matrix layer.

[0042] Specifically, the culture matrix layer includes a first culture matrix layer 22, a second culture matrix layer 23, a third culture matrix layer 24 and a fourth culture matrix layer 25 from bottom to top. The first culture matrix layer 22 is preferably terrazzo pebbles, and the particle size range of terrazzo pebbles is 3 to 6 cm. The second culture matrix layer 23 is preferably a large submersible ceramsite, and the particle size range of the large submersible ceramsite is 2-3 cm. The third culture matrix layer 24 is a small submersible ceramsite, and the particle size range of the small submersible ceramsite is 0.3 to 0.5 mm. The fourth culture matrix layer 25 is preferably oyster shell powder after high-temperature burning and crushing, and the particle size of the oyster shell powder is about 150 nm.

[0043] Preferably, the laying thickness ratio of the first culture matrix layer 22, the second culture matrix layer 23, and the third culture matrix layer 24 is 1:2:2, and the laying thickness of the fourth culture matrix layer 25 is equal to 1.5 times the maximum shell height of the cultured snails.

[0044] Preferably, the distance between the upper surface of the fourth culture substrate layer 25 and the top of the main culture box 100 is 2 / 7 of the height of the main culture box 100.

[0045] Preferably, the distance between the water outlet of the top filter box in the water treatment module 10 and the upper surface of the fourth culture matrix layer 25 is 1 / 7 of the height of the main culture box 100 .

[0046] Preferably, the distance between the breeding module 20 and the inner bottom surface of the main breeding box 100 is 1 / 7 of the height of the main breeding box 100.

[0047] In other embodiments of the present invention, the inner bottom surface of the main breeding box 100 and the bottom plate 21 are supported by support members 40 to prevent the bottom plate 21 from being overloaded and damaged. The support members 40 are preferably strip bricks.

[0048] The partition 30 includes a partition body 32, and a plurality of hollow hole groups having hollow holes 31 are arranged on the partition body 32. The number of the culture substrate layers is the same as that of the hollow hole groups, and the culture substrate layers at the same level correspond to the hollow hole groups. The hollow holes 31 in the same hollow hole group have the same diameter, and the spacing between adjacent hollow holes 31 is 1.5 times the diameter of the hollow hole 31.

[0049] The diameter of the hollow holes 31 in the hollow hole group is determined according to the particle size of the aquaculture matrix in each aquaculture matrix layer, and the diameter of the hollow holes 31 in the hollow hole group is smaller than the minimum particle size of the aquaculture matrix in the corresponding aquaculture matrix layer. The maximum diameter of the hollow holes 31 in the hollow hole group at the same horizontal height is smaller than the minimum particle size of the aquaculture matrix in the aquaculture matrix layer.

[0050] Specifically, the partition body 32 includes a first hollow hole group 33, a second hollow hole group 34, a third hollow hole group 35 and a fourth hollow hole group 36 from bottom to top. The positions of the first hollow hole group 33, the second hollow hole group 34, the third hollow hole group 35 and the fourth hollow hole group 36 correspond to the positions of the first culture matrix layer 22, the second culture matrix layer 23, the third culture matrix layer 24 and the fourth culture matrix layer 25, respectively. The maximum diameter of the hollow holes 31 in the first hollow hole group 33 is smaller than the minimum particle size of the culture matrix in the first culture matrix layer 22, the maximum diameter of the hollow holes 31 in the second hollow hole group 34 is smaller than the minimum particle size of the culture matrix in the second culture matrix layer 23, the maximum diameter of the hollow holes 31 in the third hollow hole group 35 is smaller than the minimum particle size of the culture matrix in the third culture matrix layer 24, and the maximum diameter of the hollow holes 31 in the fourth hollow hole group 36 is smaller than the minimum particle size of the culture matrix in the fourth culture matrix layer 25.

[0051] Preferably, the partition body 32 is not punched with hollow holes 31 at a distance of 5 mm from the inner wall of the main breeding box 100, and 3 mm small holes are evenly distributed.

[0052] Preferably, the gap between the bottom surface of the colony housing 100 and the bottom plate 21 and the corresponding position of the bottom layer of the partition 30 only has a support column 37, which is a fully hollow structure.

[0053] The present invention also provides a method for culturing juvenile conch shells in a small water body indoor, which utilizes the juvenile conch shells in a small water body indoor culturing system for culturing, and comprises the following steps:

[0054] Step S1, using the dead bodies of marine organisms to make dried bait pellets. Specifically comprising:

[0055] Step S11, preparing chyme from the dead marine organisms.

[0056] The dead bodies of marine organisms are any one or more of frozen or fresh-frozen fish, mollusks and small arthropods, but spoiled dead bodies of marine organisms are not allowed. One or more dead bodies of marine organisms can be made into chyme alone or mixed and homogenized.

[0057] Step S12: suspend the prepared chyme on the sieve silk for 30 to 50 minutes to drain off some of the water.

[0058] Specifically, the prepared chyme is spread into a thin layer not exceeding 3 mm, and placed on a 100-mesh sieve to drain some of the water, and the draining time is 30 minutes to 50 minutes.

[0059] Step S13, the drained chyme and oyster shell powder are mixed with a 5% sodium alginate solution in a mass ratio of 2:6:1, and stirred until completely mixed and uniform to prepare a mixture. The oyster shell powder is preferably oyster shell powder with a particle size of 75 microns.

[0060] Step S14: extract the mixture with a peristaltic pump, slowly drip it into a 1.5% calcium chloride solution, and let it stand for 2 hours to prepare wet bait particles.

[0061] Preferably, the flow rate of the peristaltic pump is set to 2.0 rpm, the discharge port is 15 cm above the liquid level of the calcium chloride solution, and the diameter of the peristaltic pump hose is 3 mm.

[0062] Step S15, take out the prepared wet bait particles, drain the water, put them into an oven and dry them into dry bait balls.

[0063] Preferably, the wet bait particles are fished out and drained, and then dried at 60° C. for 12 hours.

[0064] In an embodiment of the present invention, frozen Artemia adult, ice-fresh black porgy, and fresh long oyster soft parts are used as bait raw materials, respectively, and bait pellets are made according to the method described in the present invention for feeding, and a bait selection behavior test is carried out, and the number of snails in each feeding plate at 6 hours of feeding is used as a feeding preference index. The test results show that after 2 hours of feeding, the snails have obvious feeding behavior on the bait, and the preference of the snails for fish is more obvious, followed by shellfish, and the preference for crustaceans is the worst, and there are significant differences among the three. Therefore, when making snail bait, it is preferably made of fish or fish-based raw materials.

[0065] Step S2: In the evening of each day, 20% of the total mass of the cultured snails is taken as bait pellets and placed in a feeding tray for feeding.

[0066] Weigh the bait pellets according to the total weight of the snails, feed once a day, and feed at dusk every day. When feeding, put the bait pellets into a feeding tray made of sieve silk, wire and string, and take out the tray and the remaining bait after 8 hours, dry and weigh them.

[0067] Preferably, the daily feeding time is selected between 18:00 and 20:00 in the afternoon of the same day.

[0068] Preferably, the diameter of the feeding tray does not exceed one fifth of the shortest side length of the breeding module.

[0069] Preferably, the sieve silk used in the feeding tray is 100 mesh.

[0070] In an embodiment of the present invention, the mass of chyme made by the soft part of Artemia, sand mullet, and long oyster is mixed, and a dried bait pellet is made according to the method described in the present invention. The test is started at 14:00 in the afternoon, and the time between 17:00 to 19:00 and 5:00 to 7:00 is recorded as the dawn and dusk time, 7:00 to 17:00 is daytime, 19:00 to 5:00 in the morning of the next day is night, and the number of snails on the feeding plate is recorded every 4 hours for 24 hours. The test results show that the feeding rhythm of snails is generally less during the day, and is significantly different from the two time periods of night and dawn and dusk. The food intake at night is the largest, but it is not significantly different from the feeding behavior at dawn and dusk. Therefore, in view of the convenience of feeding and the feeding law of snails, the afternoon of the same day is selected as the feeding time.

[0071] Step S3: regularly maintain the culture substrate in the culture substrate layer, preferably once a week.

[0072] Specifically include:

[0073] Step S31, taking out the components except the bottom suction pump in the water treatment module, and retaining the bottom suction pump and the corresponding pipelines of the bottom suction pump.

[0074] Step S32, fix the bottom suction pump to the partition 30 between the aquaculture module 20 and the water treatment module, align the pump inlet with the hollow hole 31 of the partition 30, and suck out the organic matter adsorbed on the surface of the aquaculture matrix in the aquaculture matrix layer; while discharging the wastewater, add an equal amount of seawater of the same temperature and salinity.

[0075] Preferably, each time the culture substrate is maintained, 1 / 3 of the total water volume of the culture main box is discharged.

[0076] Preferably, when the culture substrate is maintained, the number of bottom suction pumps used is determined according to the size of the bottom suction pump and the width of the partition, so that the bottom suction pump can cover the entire bottom layer of the partition.

[0077] Step S33: according to the color change of the oyster shell powder in the surface culture matrix layer, remove part of the oyster shell powder with a straw and replace it. When the oyster shell powder turns yellow or black or the mucus adsorbed on the surface is visible to the naked eye, it needs to be replaced.

[0078] In addition, during the breeding process, the biochemical cotton is cleaned and replaced every 7 days, and the fresh water in the water replenisher is replaced every 15 days.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A small water body indoor culture system for snail larvae, It is characterized in that It comprises a main breeding box, a breeding module and a water treatment module arranged in the main breeding box; the breeding module and the water treatment module are separated by a hollow partition; the breeding module is a bed-type structure, comprising a hollow bottom plate arranged at a certain distance from the bottom surface of the main breeding box; the upper surface of the bottom plate is provided with a plurality of breeding matrix layers; the partition is provided with a plurality of hollow hole groups with hollow holes; the breeding matrix layers are the same in number as the hollow hole groups, and the breeding matrix layers at the same horizontal height correspond to the hollow hole groups; the water treatment module comprises a bottom suction pump; the water treatment module is configured to suck the organic matter in the breeding module through the hollow hole group and discharge it out of the main breeding box; The hollow holes in the same hollow hole group have the same diameter, and the spacing between adjacent hollow holes is 1.5 times the diameter of the hollow holes; the maximum diameter of the hollow holes in the hollow hole group at the same horizontal height is smaller than the minimum particle size of the aquaculture matrix in the aquaculture matrix layer; The culture matrix layer includes a first culture matrix layer, a second culture matrix layer, a third culture matrix layer and a fourth culture matrix layer from bottom to top; the first culture matrix layer is water-polished pebbles, and the particle size range of the water-polished pebbles is 3 to 6 cm; the second culture matrix layer is large submersible ceramsite, and the particle size range of the large submersible ceramsite is 2 to 3 cm; the third culture matrix layer is small submersible ceramsite, and the particle size range of the small submersible ceramsite is 0.3 to 0.5 mm; the fourth culture matrix layer is oyster shell powder after high-temperature burning and crushing, and the particle size of the oyster shell powder is 150 μm to 300 μm; The partition includes a partition body; the partition body includes a first hollow hole group, a second hollow hole group, a third hollow hole group and a fourth hollow hole group in sequence from bottom to top.

2. The indoor small water body culture system for snail larvae according to claim 1, It is characterized in that The particle size of the aquaculture matrix in the lower aquaculture matrix layer is greater than the particle size of the aquaculture matrix in the upper aquaculture matrix layer.

3. The indoor small water body culture system for snail larvae according to claim 1, It is characterized in that The water treatment module also includes a filter and a drip water replenisher, a protein separator with a needle brush pump and a water fairy with filter cotton; the drip water replenisher is filled with fresh water; in a non-matrix maintenance state, the filter inlet is connected to the pump outlet of the bottom suction pump, and the bottom suction pump, the needle brush pump and the filter cotton are arranged in sequence from low to high; in a matrix maintenance state, the bottom suction pump is fixed to the partition, and the pump inlet of the bottom suction pump corresponds to the position of the hollow hole group.

4. A method for cultivating snail larvae in small water bodies indoors, It is characterized in that The method of using the indoor small water body culture system for larval conchs according to any one of claims 1 to 3 for culture comprises: Using dead marine organisms to make dried bait pellets; In the evening of each day, take 20% of the total weight of the snails and place them in the feeding tray for feeding; Regularly maintain the culture substrate in the culture substrate layer.

5. The method for cultivating snail larvae in small water bodies indoors as claimed in claim 4, It is characterized in that The method of making dried bait pellets using dead marine organisms comprises: Make dead marine organisms into chyme; Let the prepared chyme stand on a sieve for 30 to 50 minutes to drain off some of the water. The drained chyme, oyster shell powder and 5% sodium alginate solution are mixed in a mass ratio of 2:6:1, and stirred until completely mixed to form a mixture; The mixture was extracted by a peristaltic pump, slowly dropped into a 1.5% calcium chloride solution, and allowed to stand for 2 hours to prepare wet bait particles; The prepared wet bait particles are scooped out, the water is drained, and they are put into an oven to dry into dry bait balls.

6. The method for cultivating snail larvae in small water bodies indoors as claimed in claim 4 or 5, It is characterized in that The dead marine organisms are any one or more of frozen or fresh-frozen fish, molluscs and small arthropods.

7. The method for cultivating snail larvae in small water bodies indoors as claimed in claim 4, It is characterized in that The periodic maintenance of the culture substrate in the culture substrate layer comprises: Take out the components except the bottom suction pump from the water treatment module, and keep the bottom suction pump and the corresponding pipelines of the bottom suction pump; The bottom suction pump is fixed to the partition between the aquaculture module and the water treatment module, and the pump inlet is aligned with the hollow hole of the partition to suck out the organic matter adsorbed on the surface of the aquaculture matrix in the aquaculture matrix layer; while the wastewater is discharged, an equal amount of seawater of the same temperature and salinity is added; According to the color changes of the oyster shell powder in the surface culture substrate layer, part of the oyster shell powder was removed with a straw and replaced.

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