CN203194300U - Artificial fish-collecting protection device - Google Patents

Abstract

The utility model discloses an artificial fish-gathering protection device with cheap raw materials, convenient material acquisition, simple manufacturing method and extremely low cost, which overcomes the complex manufacturing process and high cost of artificial fish-gathering protection devices such as artificial fish reefs in the prior art The problem. The artificial fish-gathering protection device includes a base frame composed of several closed collars, any collar is at least interlocked with another collar, and the collar is provided with at least one bottomless A reef cave made of beverage bottles, a grid frame made of fish feed is provided at the mouth of the reef cave, a calcium carbonate adhesion layer is provided on the reef cave, and at least one Collar hole, the collar hole on the reef is passed through by the collar connected to itself. The utility model is suitable for the occasions where the artificial fish-gathering protection device was used in the past, and has the advantages of convenient material collection, simple manufacturing method, low cost and the like.

Description

An artificial fish gathering protection device

technical field

The utility model belongs to the field of fish breeding, in particular to an artificial fish gathering protection device.

Background technique

In marine fisheries, various artificial fish gathering devices and protection devices such as artificial reefs have played an important role in increasing production. At present, fishery auxiliary devices such as artificial reefs are mostly made of concrete, discarded hulls, tires, etc. The manufacturing process is relatively complicated and the cost is high. And fishery auxiliary devices such as fish reefs of the prior art need to be provided with sinking device or weight-increasing structure, so that it can be in the vicinity of the seabed or ensure its position by a structure connected to the seabed, so when maintaining and recycling more inconvenient. Furthermore, in shallow seas and middle seas, seaweed, one of the main food for fish, lacks a growth basis. The existing artificial reefs have a very limited area for seaweed to attach to their own volume. At least half of the provided attachment area cannot be exposed to direct light, which will affect the growth rate of algae and affect the fish gathering effect.

See "an artificial reef" disclosed in the Chinese patent literature, the announcement number of which is CN102599081A. The artificial reef includes an artificial reef body, which is characterized in that the artificial reef body is in an inverted "Y" shape. The body of the artificial fish reef in the shape of an inverted "Y" is formed by an upper unit, a lower left unit and a lower right unit cast from reinforced concrete. The upper unit is in the shape of an "arrow" vertically downwards. It is formed by oblique columns, upper middle columns and upper right oblique columns. The lower left unit is in the shape of an upward and right-inclining "arrow", which is formed by left lower left oblique columns, left lower middle columns and left lower right oblique columns. The lower right unit is in the shape of an upward and leftward slanting "arrow", which is formed by the lower right and left oblique column, the lower right middle column and the lower right oblique column. The utility model builds places for fish spawning and inhabitation by combining and stacking, and can greatly improve the stability and hydrodynamic performance of artificial fish reefs in the case of several combinations. However, this kind of fish reef is made of reinforced concrete by casting, and the manufacturing process not only requires molds, but also requires a reasonable control process, so the manufacturing cost is relatively high; and because this kind of fish reef is a submerged fish reef, it is on the seabed when working , its recovery and maintenance are relatively inconvenient, and lack of effective positioning devices, it is easy to be taken away from the original position by ocean currents, making recovery difficult.

Refer to the "floating controllable depth fish reef" disclosed in the Chinese patent literature, its announcement number is CN102228012A, the floating controllable depth fish reef includes a rope and a floating ball connected in series on the rope, wherein: the middle part of the rope passes The fixed pulley is connected with a self-sinking suction anchor through a buffer rope; the end of the rope is connected with a pontoon; the surface of the pontoon is evenly distributed with attachment rings; the attachment ring is connected with an attachment rope. It has the advantages of being able to adjust the suspension depth for artificial proliferation, good stability and not easy to anchor, superior ecological performance, multi-water layer proliferation, and good proliferation effect. Although the above-mentioned fish reefs can provide a certain area of seaweed attachment, compared with the space occupied by themselves, ropes, floating balls, etc. are unfavorable for attachment, and the distance from the reef itself is far away. The contribution of the floating body is also very limited, and only the part on the floating body is available for attachment, and no matter where the floating body is, it will always be partially blocked by the floating body, resulting in many areas that are difficult to receive direct sunlight. Seaweed cannot provide a favorable growth environment as large as possible, so that the effect of gathering fish is also affected. Moreover, the artificial reef is positioned on the seabed through a self-sinking suction anchor. If it needs to be maintained, it needs to enter the sea area to maintain the floating body. If it wants to recover, it needs to enter the sea area to recover the self-sinking suction anchor, and then recycle the floating body, rope and floating ball. Very inconvenient.

Utility model content

The purpose of this utility model is to solve the problems of complex manufacturing process and high cost of artificial fish gathering protection devices such as artificial fish reefs in the prior art, and to provide a kind of low-cost raw material, easy to obtain materials, simple manufacturing method and extremely low cost. Artificial fish gathering protection device.

Another purpose of the utility model is to provide an artificial fish-gathering protection device that is easy to maintain and recycle in order to solve the problem of inconvenient maintenance and recycling of artificial fish-gathering protection devices such as artificial fish reefs in the prior art.

Another purpose of this utility model is to solve the problem of low ratio of seaweed attachable area and directly illuminated area of artificial fish gathering protection devices such as artificial fish reefs in the prior art, and to provide a kind of seaweed attachment that can make full use of the whole It is an artificial fish-gathering protection device that can fully receive light on the surface and the area where the seaweed is attached.

The utility model is achieved through the following technical solutions:

An artificial fish-gathering protection device, comprising a base frame composed of several closed collars, any collar is at least interlocked with another collar, and the collar is provided with at least one bottomless beverage bottle. A reef hole formed, the mouth of the reef hole is provided with a grid frame made of fish feed, the described reef hole is provided with a calcium carbonate adhesion layer, and the described reef hole is provided with at least one collar hole , the collar hole on the reef is passed through by the collar connected to itself. A number of collars can be arbitrarily selected as fixed rings on the base frame and fixed near the surface of the coast by piles, etc., and the remaining collars are hung into the seawater. In this way, a reef cave that continuously covers a certain range from the coast surface to the shallow sea and mid-sea area is formed, which can provide a continuous fish-gathering protection structure within the coverage area. The reef is made of beverage bottles, which is extremely convenient to obtain. Compared with the previous artificial reefs or even artificial reefs made of waste, the cost is also very low, and the manufacturing process is also simple. The utility model is suitable for shallow and middle sea areas, one is closer to the water surface, and the other is fixed near the coast surface, so recycling is very convenient, and compared with the fish reefs in the prior art, the base frame itself is connected to the reef caves The device is also a connection and recovery structure, and does not require additional limit or connection structures such as connecting ropes. Moreover, the base frame can move within a certain range with the ocean current. In the ocean current, it is rich in seabed nutrients brought up by the vertical ocean current, which is most conducive to the growth of fish food such as seaweed. The base frame and the reef can be placed at any time. The place where the ocean current moves most frequently in a certain area is most conducive to the attachment and growth of seaweed, providing abundant bait for fish. When the utility model is put into use at the beginning, it can be used for fry cultivation. At this time, the fry can enter the reef cave, but the larger fish will be blocked by the grid frame and cannot eat the fry in the reef cave. The grid frame made of fish feed can only enter the reef hole after being gradually eaten by fish schools. At this time, the initial stage of fry cultivation has passed, so the survival rate of fry can be guaranteed. At this time, the reef hole can also be used as a habitat for larger fish And shelter, the attachment layer on the reef cave is conducive to the growth and attachment of algae.

Preferably, one side of the rectangular base frame is provided with several floating bodies, and the floating bodies are complete beverage bottles. The floating body is suspended at the end far away from the coastline, so that the base frame can be spread out better. The middle part of the base frame is at the lowest position, and the two ends are higher, which can not only cover the horizontal direction, but also ensure the coverage in the depth direction. Large fish gathering range, and the base frame is fully spread, so that the seaweed as fish bait has a large enough attachment range, and at the same time can fully reduce the mutual shading between the various parts of the base frame, so that the attachment to the base frame and other The seaweed attached to the structure can have sufficient light to grow well to provide abundant bait, so as to maximize the function of gathering and protecting fish. Moreover, the floating body is also made of beverage bottles, which is convenient to obtain and low in cost.

As a preference, the large opening at the bottom of the bottomless beverage bottle made into the reef cavity is provided with several cracks parallel to the axis of the reef cavity, and the lower end of the side wall of the reef cavity is turned up along the cracks to form a number of outward flanges. The end section of the turned edge is connected with the outer wall of the reef to form a discontinuous annular outer cavity, and the outer cavity is evenly distributed along the axis of the reef. The outer cavity is a discontinuous annular space with a large number of seaweed attachment points, which can make the seaweed attach well, and the space utilization rate is high. The outer cavity itself is also a fish habitat and protection structure, and fish can enter the outer cavity to inhabit and hide.

As preferably, the base frame is provided with several spore cultivation bottles made of bottomless beverage bottles with lids, and the gauze covering the bottom of the spore cultivation bottles is provided on the described spore cultivation bottles, and the spore cultivation The inside of the bottle is divided into several storage chambers by several iron sheets distributed along the axis of the spore cultivation bottle. The compacted mixture of seaweed spores and sawdust is arranged in the storage chamber, and the thickness of the iron sheets is 0.35mm to 0.7mm. The iron sheet on the spore cultivation bottle will be corroded in seawater. After the iron sheet closest to the bottom of the bottle is completely corroded and consumed, the spores in the first storage chamber will come into contact with the seawater outside. Under certain conditions, it will look for the attachment base to attach and start to grow seaweed filaments and fronds. Since the spores and wood chips are compacted and mixed, it is not easy to be directly taken away by the flowing sea water, and the spores can be left in a small amount and slowly. The spore culture bottle is attached to the pedestal, the reef hole surface, etc. as much as possible, so as to improve the amount of seaweed in the vicinity of the utility model. And some iron plates separate the spore culture bottle into several storage chambers, so the seaweed spores can be provided at regular intervals to ensure that a large amount of seaweed can be attached to and grow for a long time near the reefs, etc., so as to attract fish schools and provide food for a long time. The thickness of the iron sheet can be determined according to the cycle of providing spores. Every cycle, an iron sheet is corroded and consumed, and the spores in a storage cavity near the bottom of the bottle will contact seawater and grow attached under suitable conditions.

Preferably, the spore culture bottle is provided with an auxiliary attachment base, and the material of the auxiliary attachment base is shell fragments. Seashells contain a large amount of calcium carbonate. Common seaweeds in shallow and middle seas, such as laver and kelp, have spores and filaments that can dissolve calcium carbonate when they grow, and are easier to attach to shells and drill into them. Therefore, the auxiliary attachment base can increase the amount of attached seaweed, provide more fish bait, and have a better effect of gathering fish.

Preferably, the reef cavity is provided with an inner cavity formed by a bottomless beverage bottle smaller than the reef cavity, the mouth of the inner cavity is connected to the bottle mouth of the reef cavity, and the inner wall of the reef cavity is connected to the bottle mouth of the reef cavity. The larvae cavity is formed between the outer walls of the cavity. The inner cave cavity can be used as a habitat for ordinary fish, and the larva cavity between the inner cave cavity and the reef cave can be used as a specific protection place for larvae. Larvae refer to a type of fry whose volume Smaller, so it can pass through the entrance of the larvae cavity, while the fish that can devour the larvae is larger and can only enter the inner cavity but not the cavity of the larvae, so it can have a good effect on the larvae Protect, improve the survival rate of larvae and juvenile fish, and ensure fishery output.

Therefore, the beneficial effects of the utility model are: (1) It is convenient to obtain materials, the manufacturing method is simple, and the cost is low; (2) It accepts a wide range of light, less dead angles in the backlight, and the attached seaweed can fully grow.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the schematic diagram of the structure of the bottom surface of the reef hole of the utility model embodiment 1;

Fig. 3 is the structural representation of the utility model spore culture bottle;

Fig. 4 is a schematic diagram of the structure of the bottom surface of the reef cave in Embodiment 2 of the utility model.

In the figure: base frame 1, reef hole 2, grid frame 3, floating body 4, outer flange 5, spore cultivation bottle 6, iron sheet 7, storage cavity 8, inner cave cavity 9, larva cavity 10.

Detailed ways

Below by embodiment, in conjunction with accompanying drawing, the technical scheme of the utility model is further described:

Embodiment 1: a kind of artificial fish-gathering protection device as shown in Fig. 1, Fig. 2, comprise the base frame 1 that is made of several closed collars, any collar at least and another collar mutually surround each other, described At least one reef cave 2 made of bottomless beverage bottle is provided on the collar of the reef cave 2. A grid frame 3 made of fish feed is provided at the mouth of the reef cave 2. The reef cave 2 is provided with Calcium carbonate adhesion layer, two collar holes are arranged on the reef cave 2, and the collar holes on the reef cave 2 are passed through by the collar connected with itself. One side of the rectangular base frame 1 is provided with several floating bodies 4, and the floating bodies 4 are complete beverage bottles. The floating body 4 is suspended at the end far away from the coastline, so that the base frame 1 can be rolled out better. In order to ensure the largest possible fish gathering range, the base frame 1 is fully spread out, so that the seaweed as fish bait has a large enough attachment range, and at the same time, the mutual shading between the parts of the base frame 1 can be fully reduced, so that the attachment The algae on the pedestal 1 and other attached structures can have sufficient light to grow well to provide abundant bait, so that the functions of gathering and protecting fish can be maximized. The big opening at the bottom of the bottomless beverage bottle made into the reef cave 2 is provided with a number of cracks parallel to the axis of the reef cave 2, and the lower end of the side wall of the reef cave 2 is turned up along the crack to form a number of valgus 5. The end section of the valgus 5 is connected with the outer wall of the reef 2 to form a discontinuous annular outer cavity, and the outer cavity is evenly distributed along the axis of the reef 2. The outer cavity is a discontinuous annular space with a large number of seaweed attachment points, which can make the seaweed attach well, and the space utilization rate is high. The outer cavity itself is also a fish habitat and protection structure, and fish can enter the outer cavity to inhabit and hide. The reef cave 2 is provided with an inner cave cavity 9 formed by a bottomless beverage bottle with a volume smaller than the reef cave 2, and the mouth of the inner cave cavity 9 is connected to the bottle mouth of the reef cave 2, and the reef cave 2 is A cavity 10 for juvenile fish is formed between the inner wall and the outer wall of the cavity 9 . The inner hole cavity 9 can be used as a habitat for ordinary fish, and the larva cavity 10 between the inner hole cavity 9 and the reef hole 2 can be used as a specific protection place for the larvae. The larvae refer to a kind of fry type, its volume is small, so it can pass through the entrance of the larvae cavity 10, and the fish that can devour the larvae is relatively large, and can only enter the inner cavity 9 but cannot enter the cavity 10 of the larvae, so it can be used for The larvae and juveniles play a good role in protection, improve the survival rate of larvae and juveniles, and ensure fishery output.

Several collars can be arbitrarily selected as fixed rings on the base frame 1 and fixed near the surface of the coast by means of lowering stakes, etc., and the remaining collars are hung into the seawater. In this way, a piece of reef cave 2 covering a certain range is formed continuously from the coast surface to the shallow sea and mid-sea area, which can provide a continuous fish-gathering protection structure within the coverage area. Structures such as the reef hole 2 and the floating body 4 are all made of beverage bottles, and the materials are extremely convenient. Compared with the artificial fish reefs made of artificial fish reefs or even waste materials in the past, the cost is also very low, and the manufacturing process is also simple. The utility model is suitable for shallow and medium sea areas, one is closer to the water surface, and the other is fixed near the coast surface, so recycling is very convenient, and compared with the fish reefs of the prior art, the base frame 1 itself is connected to the reef caves The device of 2 is also a connection and recovery structure, and does not need additional spacing or connection structures such as connecting ropes. Furthermore, the utility model has a larger range of exposure to light, and the light can be directly illuminated from each collar, and there are few dead angles of illumination. Compared with the bottom of the fish reef and the backlight in the past, which cannot be fully illuminated, the utility model No matter the seaweed attached to the base frame 1 or the reef hole 2 can receive sufficient light, and the base frame 1 can move within a certain range with the ocean current. Nutrients on the bottom of the seabed are most conducive to the growth of seaweed and other fish food. The base frame 1 and the reef hole 2 can be located at the place where the ocean current moves most frequently in a certain area at any time, which is most conducive to the attachment and growth of seaweed, and provides abundant food for fish. The bait has a good fish gathering effect. When the utility model is put into use at the beginning, it can be used for cultivating fry. At this time, fry can enter the reef hole 2, but larger fish will be blocked by the grid frame 3 and cannot eat the fry in the reef hole 2. It is necessary to wait for the grid frame 3 made of fish feed to be gradually eaten by the fish before entering the reef hole 2. At this time, the initial stage of fry cultivation has been passed, so the survival rate of the fry can be guaranteed. At this time, the reef hole 2 can also be used as a volume. Habitat and places of refuge for larger fish, and the attachment layer on the reef hole 2 is also conducive to the growth and attachment of seaweeds.

Embodiment 2: a kind of artificial fish-gathering protective device as shown in Fig. 1, Fig. 3, comprise the base frame 1 that is made of several closed collars, any collar at least and another collar mutually surround each other, described At least one reef cave 2 made of bottomless beverage bottle is provided on the collar of the reef cave 2. A grid frame 3 made of fish feed is provided at the mouth of the reef cave 2. The reef cave 2 is provided with Calcium carbonate adhesion layer, two collar holes are arranged on the reef cave 2, and the collar holes on the reef cave 2 are passed through by the collar connected with itself. One side of the rectangular base frame 1 is provided with several floating bodies 4, and the floating bodies 4 are complete beverage bottles. The floating body 4 is suspended at the end far away from the coastline, so that the base frame 1 can be rolled out better. In order to ensure the largest possible fish gathering range, the base frame 1 is fully spread out, so that the seaweed as fish bait has a large enough attachment range, and at the same time, the mutual shading between the parts of the base frame 1 can be fully reduced, so that the attachment The algae on the pedestal 1 and other attached structures can have sufficient light to grow well to provide abundant bait, so that the functions of gathering and protecting fish can be maximized. Moreover, the floating body 4 is also made of a beverage bottle, which is convenient to obtain and low in cost. The big opening at the bottom of the bottomless beverage bottle made into the reef cave 2 is provided with a number of cracks parallel to the axis of the reef cave 2, and the lower end of the side wall of the reef cave 2 is turned up along the crack to form a number of valgus 5. The end section of the turned edge 5 is connected with the outer wall of the reef cave 2 to form a discontinuous annular outer cave cavity, and the outer cave cavity is evenly distributed along the axis of the reef cave 2. The outer cavity is a discontinuous annular space with a large number of seaweed attachment points, which can make the seaweed attach well, and the space utilization rate is high. The outer cavity itself is also a fish habitat and protection structure, and fish can enter the outer cavity to inhabit and hide. Described pedestal 1 is provided with some spore cultivation bottles 6 made of bottomless beverage bottles with lids, and described spore cultivation bottles 6 are provided with gauze covering the bottom of spore cultivation bottles 6, and the spore cultivation The cultivation bottle 6 is divided into several storage chambers 8 by some iron sheets 7 distributed along the axis of the spore cultivation bottle 6. The compacted mixture of seaweed spores and sawdust is arranged in the storage chamber 8. The thickness of the iron sheets 7 is 0.35mm to 0.7mm. The iron sheet 7 on the spore cultivation bottle 6 will be corroded in seawater. After the iron sheet 7 near the bottom of the bottle is completely corroded and consumed, the spores in the first storage chamber 8 will come into contact with the seawater of the outside world. And under the condition of suitable temperature, it will look for the attachment base to attach and start to grow seaweed filaments and fronds. Since the spores and sawdust are compacted and mixed, it is not easy to be directly taken away by the flowing sea water, which can make a small amount of spores , leave spore culture bottle 6 slowly, make it be attached to places such as pedestal 1, reef hole 2 surfaces as much as possible, improve the amount of seaweed in the vicinity of the utility model. And some iron sheets 7 separate the spore culture bottle 6 into some storage chambers 8, so the seaweed spores can be provided at intervals to ensure that a large amount of seaweed can be attached and grown for a long time near the reef hole 2, so as to attract fish and fish for a long time. Food is provided, and the thickness of the iron sheet 7 can be determined according to the cycle that the spores need to be provided, each cycle an iron sheet 7 is corroded and consumed, and the spores in a storage cavity 8 close to the bottom side of the bottle will contact with the seawater and Adhesive growth under suitable conditions. For example, it is necessary to provide spores once a year, and the CuCr cast iron iron sheet 7 is selected, so the thickness of the iron sheet 7 is selected as 0.35mm, because the corrosion rate of CuCr cast iron in seawater is 0.35mm per year. The spore culture bottle 6 is provided with an auxiliary attachment base, and the material of the auxiliary attachment base is shell fragments. Seashells contain a large amount of calcium carbonate. Common seaweeds in shallow and middle seas, such as laver and kelp, have spores and filaments that can dissolve calcium carbonate when they grow, and are easier to attach to shells and drill into them. Therefore, the auxiliary attachment base can increase the amount of attached seaweed, provide more fish bait, and have a better effect of gathering fish.

Several collars can be arbitrarily selected as fixed rings on the base frame 1 and fixed near the surface of the coast by means of lowering stakes, etc., and the remaining collars are hung into the seawater. In this way, a piece of reef cave 2 covering a certain range is formed continuously from the coast surface to the shallow sea and mid-sea area, which can provide a continuous fish-gathering protection structure within the coverage area. Structures such as the reef hole 2 and the spore culture bottle 6 are all made of beverage bottles, which are extremely convenient to obtain materials. Compared with the previous artificial reefs or even artificial reefs made of waste, the cost is also very low, and the manufacturing process is also simple . The utility model is suitable for shallow and medium sea areas, one is closer to the water surface, and the other is fixed near the coast surface, so recycling is very convenient, and compared with the fish reefs of the prior art, the base frame 1 itself is connected to the reef caves The device of 2 is also a connection and recovery structure, and does not need additional spacing or connection structures such as connecting ropes. Furthermore, the utility model has a larger range of exposure to light, and the light can be directly illuminated from each collar, and there are few dead angles of illumination. Compared with the bottom of the fish reef and the backlight in the past, which cannot be fully illuminated, the utility model No matter the seaweed attached to the base frame 1 or the reef hole 2 can receive sufficient light, and the base frame 1 can move within a certain range with the ocean current. Nutrients on the bottom of the seabed are most conducive to the growth of seaweed and other fish food. The base frame 1 and the reef hole 2 can be located at the place where the ocean current moves most frequently in a certain area at any time, which is most conducive to the attachment and growth of seaweed, and provides abundant food for fish. The bait has a good fish gathering effect. When the utility model is put into use at the beginning, it can be used for cultivating fry. At this time, fry can enter the reef hole 2, but larger fish will be blocked by the grid frame 3 and cannot eat the fry in the reef hole 2. It is necessary to wait for the grid frame 3 made of fish feed to be gradually eaten by the fish before entering the reef hole 2. At this time, the initial stage of fry cultivation has been passed, so the survival rate of the fry can be guaranteed. At this time, the reef hole 2 can also be used as a volume. Habitat and places of refuge for larger fish, and the attachment layer on the reef hole 2 is also conducive to the growth and attachment of seaweeds.

Claims (5)

1. An artificial fish-gathering protection device, characterized in that it includes a base frame (1) composed of several closed collars, any collar is at least mutually looped with another collar, and the collar is provided with There is at least one reef cave (2) made of a bottomless beverage bottle, a grid frame (3) made of fish feed is provided at the mouth of the reef cave (2), and the reef cave (2) A calcium carbonate adhesion layer is provided on the reef cave (2), and at least one collar hole is provided on the reef cave (2), and the collar hole on the reef cave (2) is passed through by a collar connected to itself. 2. An artificial fish-gathering protection device according to claim 1, characterized in that, one side of the rectangular base frame (1) is provided with several floating bodies (4), and the floating bodies (4) are Complete drink bottle. 3. An artificial fish-gathering protection device according to claim 1 or 2, characterized in that, the bottom mouth of the bottomless beverage bottle made of reef holes (2) is provided with several reef holes (2) The axis is parallel to the crack, and the lower end of the side wall of the reef cave (2) is turned up along the crack to form several outward turning edges (5). 4. An artificial fish-gathering protection device according to claim 3, characterized in that, the end section of the outer flange (5) is connected with the outer wall of the reef cave (2) to form a discontinuous annular outer cave cavity, The outer cavities are evenly distributed along the axis of the reef (2). 5. An artificial fish-gathering protective device according to claim 1 or 2, characterized in that, the reef cave (2) is provided with an inner cavity formed by a bottomless beverage bottle smaller in volume than the reef cave (2). Cave cavity (9), the mouth of the inner cave cavity (9) is connected to the mouth of the reef cave (2), and a small hole is formed between the inner wall of the reef cave (2) and the outer wall of the inner cave cavity (9). Juvenile cavity (10).

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