KR102052926B1 - Artificial reef having plus type fishway - Google Patents

Abstract

Disclosed is a plus space artificial fishway and fish reef. According to the present invention, the plus space artificial fishway and fish reef comprises: a main body which comprises a central part and four protrusion parts protruding towards four directions based on the central part; and a fishway which is formed inside the main body and communicates the central part with each of the protrusion parts. The fishway is communicated with the outside by each of opening ports formed in an end portion in each of the protrusion parts. According to the present invention, the artificial fishway and fish reef formed as a cross shape comprises the fishway communicating the inside thereof, the opening parts and a side open hole, thereby playing a role of artificial fish reef and a fishway and a role of a fishway when installed in a stream and the like.

Description

Plus space artificial seaweed {ARTIFICIAL REEF HAVING PLUS TYPE FISHWAY}

The present invention relates to a plus-space artificial esophagus, more specifically, it is possible to create a space in which marine life can hide, spawn, inhabit, the role of small fish in the upstream area of the fish and a support means for preventing erosion It is about a plus space artificial fish.

In general, the reef is a ridge of the seabed where marine life is gathered a lot, and it is called reef, retreat, and state depending on its shape, width, depth, and quality. The circulation of seawater becomes active, and plankton grows in large quantities, and the food chain of the ecosystem is naturally formed, forming a good fishing ground.

Therefore, artificial reefs are artificial structures for aquatic resources in coastal waters, and are provided as a place for spawning and breeding fish and shellfish, and as a hiding place for protecting and nurturing young fry. In other words, artificial reefs are to artificially provide space for hiding, spawning, and inhabiting marine life, and they are mainly installed in the water of 10-50m depth.

As algae collide with these artificial reefs, water flows and vortices are generated, thereby raising the floating matter accumulated on the sea floor, thereby creating an environment in which various plankton can multiply and increase the productivity of coastal fisheries.

There are many reasons for the reduction of fishery resources in recent years, but most of them destroy marine ecosystems due to the loss of resources and excessive catching due to environmental pollution and landfill. It is necessary to restore the fishing environment through the group of artificial reefs, which can artificially protect and foster marine life in the destroyed offshore, and provide a habitat for high quality fish and shellfish.

As such, artificial reefs are used for the purpose of protecting fisheries from low-tethered nets with high catching capacity, and for cultivating fishery resources by forming hideouts and spawning grounds for various fish and shellfish. Although it is stable to external force, there is a high risk of falling due to strong algae, currents or waves, and there are places where various cheers and plaques can hide away from the eyes of natural enemies, and there is no hiding place in the seas with strong algae or smooth adjustment. There was a problem that can not create an environment in which the cheer and chippings can safely live.

As a prior art, Korean Patent Publication No. 10-2018-0033782 (published: 2018.04.04) discloses an artificial reef of high strength rootless concrete structure. As shown in FIG. 1, the artificial reef 100 according to the prior art includes a high strength plain concrete structure 110 that secures a compressive strength of 40 MPa or more without using reinforcing bars and has a rectangular shape.

According to such artificial reefs, while securing sufficient strength required for artificial reefs, not only can significantly lower the manufacturing cost of artificial reefs, but also prevent degradation of durability and environmental pollution due to corrosion of reinforcing bars.

However, the artificial reefs according to the prior art, as shown in Figure 1 has a problem that is easily conducted by waves or birds by being made in a hexahedral shape.

In addition, there was a problem that marine life lacks the space for hiding, spawning, inhabiting and can not function as fish.

. Republic of Korea Patent Publication No. 10-2018-0033782 (published: 2018.04.04)

An object of the present invention is to provide an artificial reef that allows marine organisms to function as stealth, spawning, habitat and nursery, and to prevent erosion such as the esophagus and coastal areas of upstream areas of migratory fish. It is to provide artificial reefs that can also serve as a supporting means.

Another object of the present invention is to provide an artificial echo that not only has an attenuation function so that it is not easily overturned or inverted by birds or waves, but also easily hides, scatters, breeds, and secures space as a nursery.

In addition, the problem to be solved by the present invention is not limited to the above-mentioned technical problem, and other technical problems not mentioned are clearly to those skilled in the art from the following description. It can be understood.

The object is, according to the present invention, a main body including a central portion and four protrusions projecting in all directions with respect to the central portion; And an airway formed inside the main body and communicating with the central portion and each of the protrusions, wherein the fishery is in communication with the outside in all directions by respective openings formed at the end of each of the protrusions. , Plus space artificial fish.

On each side of the protrusion, side openings communicating with the esophagus may be formed to allow the flow of water to pass smoothly and to attenuate the resistance due to the wave force.

The upper surface of each of the protrusions, the flow of water flowing through the side opening and the opening by each of the openings by the help or wave flows upward to attenuate the help or wave force, and a plurality of flows to smoothly flow Blow holes may be formed.

The central portion may be formed in communication with the esophagus, the esophagus center hole through which a fixing pile for fixing the main body to the sea bottom.

On the upper surface of the main body, natural stones for helping the seaweed or plants to slide, and provide an environmentally friendly environment for growth may be embedded in part.

The main body may be formed in a "╋" shape from a planar point of view.

In both upper regions of the protruding portion, an area extension portion for extending the attachment area of the attachment organism is formed to extend outwardly or connected to the upper region of the adjacent protruding portion, so that the water flows smoothly in the up and down directions. A plurality of through holes may be formed.

In the central portion of the main body, an inner space is formed therein, and an upper space forming portion of a polygon in which flow holes communicating with the inner space are formed on an upper surface and each side thereof may protrude upward.

The inner space of the upper space forming unit may communicate with the esophagus through an esophagus central hole formed in the central portion of the main body.

A bottom through hole may be formed at a bottom of the protrusion of the main body so that a part of the sea bottom surface communicates with the esophagus and is exposed to the esophagus.

At each upper end of the protruding portion, a slope for resistance avoidance may be formed, respectively.

According to the present invention, an artificial fish that has a “╋” type is provided with a fishery, an opening, and a side open hole communicating with the inside, whereby marine life can perform functions as a hiding place, spawning, habitat, and nursery. In addition to serving as a candle, it can be installed in rivers, etc., to provide an effect that can serve as a small fish in the upstream area of migratory fish.

In addition, it is possible to provide an effect capable of acting as a support means for preventing erosion by installing artificial esophagus according to the present invention on an inclined surface such as coast.

In addition, side openings are formed on the sides of each protrusion of the main body, and blow holes are formed on the upper surface, so that even if wave force caused by birds or waves is applied to the main body, the wave power is remarkably attenuated by being discharged through the side openings and the openings. It is possible to provide an effect that can be prevented from being conducted by an external force due to the wave force and the like.

In addition, the protrusions are formed in the main body, and side openings, openings, and ejection holes are formed in the side and end regions of the protrusions, so that the flow and flow of water flows smoothly, thereby supplying fresh oxygen and plankton to marine life. It is possible to provide an effect that can be achieved.

1 is a perspective view showing an artificial reef according to the prior art.
2 is a perspective view showing a plus space artificial island according to the first embodiment of the present invention.
3 is a cross-sectional view taken along the line AA of FIG. 2.
4 is a cross-sectional view taken along line BB of FIG. 2.
5 is a perspective view showing a plus space artificial island according to a second embodiment of the present invention.
6 is a cross-sectional view taken along line CC of FIG. 5.
7 is a cross-sectional view taken along the line DD of FIG. 5.
8 is a cross-sectional view showing a state in which the plus space artificial echochodo according to the present invention is fixed to the sea bottom by a fixed pile.
FIG. 9 is a view illustrating a plus space artificial island according to a third embodiment of the present invention, which is a perspective view of a state in which natural stones are provided in the artificial island.
10 is a view showing a plus-space artificial echo according to a fourth embodiment of the present invention, which is a partially enlarged cross-sectional view showing a state in which a natural material composed of sand and gravel is integrated on the surface of the artificial echo.
11 and 12 are views illustrating a plus space artificial island according to a fifth embodiment of the present invention.
FIG. 13 is a perspective view illustrating a plus space artificial island according to a sixth embodiment of the present invention. FIG.
14 and 15 are a plan view showing a state in which the plus-space artificial esophagus according to the present invention is arranged at various angles.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing the present invention, descriptions of already known functions or configurations will be omitted to clarify the gist of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, the words 'comprises' and / or 'comprising' do not exclude the presence or addition of one or more other components.

2 is a perspective view illustrating a plus space artificial fish according to a first embodiment of the present invention, FIG. 3 is a cross-sectional view taken along the line A-A of FIG. 2, and FIG. 4 is a cross-sectional view taken along the line B-B of FIG. 2.

As shown in Figures 2 to 4, the plus space artificial reef 10 according to the first embodiment of the present invention, is installed on the coast and the role of artificial reefs of the hiding, spawning, habitat and nursery function of marine life and In other words, it is intended to serve as a support for small fish in upstream areas of migratory fishes and to prevent sea erosion of coastal and slopes.

The artificial islands 1 are formed to have a predetermined height as a whole, and are formed in the shape of " ╋ " in a plan view, and four projections 12A, 12B, 12C, and 12D are formed on four sides of the central portion C, respectively. It includes a main body 10. The body 10 may be formed in various sizes. At this time, the length (distance from the central portion to the end portion of the protrusion) of each protrusion 12A, 12B, 12C, 12D may be formed as short as necessary but long. However, it is preferable that the length of the protrusion 12 is formed to be approximately 1.5 to 3 times the length of the height of the main body 10. This is because when the length of the projection 12 is shorter than 1.5 times, the possibility of conduction due to the wave force becomes high, and when formed longer than 3 times, the possibility of conduction becomes low, but at the boundary region between the central portion C and the protrusion 12, This is because the rigidity of the resin is lowered and the movement and transportation thereof are not easy. Therefore, the length of the protrusion 12 based on the height of the main body 10 is preferably formed to a length of 1.5 to 3 times.

Inside the main body 10, an island 14 for communicating the central portion C and the projections 12A, 12B, 12C, and 12D is formed. That is, the fish 14 is formed in the shape of " 를 " as shown in FIG. 4 by communicating the inside of the central portion C with the inside of each of the protrusions 12A, 12B, 12C, and 12D.

This island 14 is in communication with the outside in all directions by the openings 12A-1, 12B-1, 12C-1, 12D-1 formed at the ends of each projection 12. That is, by the openings 12A-1, 12B-1, 12C-1, and 12D-1, external water flows into the airway 14 and water flows out of the airway 14 smoothly. Can be done.

As shown in FIG. 2, at each upper end of each of the protrusions 12A, 12B, 12C, and 12D, inclined surfaces 12A-5, 12B-5, 12C-5, and 12D-5 for resistance avoidance are centered. (C) is formed inclined in the outward direction, respectively. The inclined surfaces 12A-5, 12B-5, 12C-5, and 12D-5 for avoiding resistance are for minimizing the resistance at the corners when wave force or tidal force is generated.

And, the upper and lower centers of the central portion C of the main body 10 are each formed with an airway center hole 16 communicating with the fish 14. The fishery 14 may communicate with the upper portion of the body 10 by the fishery hole 16. In addition, the fish core hole 16 formed in the lower side to expose a portion of the sea bottom toward the fish 14, thereby providing a more natural environment for marine life.

As shown in FIG. 8, the fish core hole 16 formed at the center of the central portion C has an inclined surface of a river when the main body 10 forms a fish on a sea bottom, a coastal inclined surface or a river. Fixing pile 30 for fixing to the penetrates through. That is, the main body 10 is firmly fixed to the sea bottom or the inclined surface by penetrating the fixed pile 30 through the central hole 16 in the state where the body 10 is seated on the sea bottom or the inclined surface. Can be.

As described above, in the case where the artificial seaweed 1 is installed on the coastal inclined surface or the seabed inclined surface by the fixed pile 30, erosion of the corresponding coastal inclined surface or the seabed inclined surface can be prevented. In addition, it is possible to maintain a stable fixed state when installed on the inclined surface of the river to form the island.

As described above, the artificial islands 1 have an overall shape of a "형상" shape, and four projections 12A, 12B, 12C, and 12D are formed on four sides of the central portion C, respectively, so that the waves The phenomenon that the main body 10 is conducted by the resistance by the algae can be prevented.

In addition, the inside 14 of the main body 10 is formed in the shape of a "╋", the openings 12A-1, 12B-1, 12C-1, 12D-1 of each projection 12A, 12B, 12C, 12D. It is formed so as to open in all directions through the shells, so that it is possible to smoothly infiltrate marine organisms, inflow of oxygen and plankton required for habitation, and to facilitate stealth movement by fry or small fish to avoid natural enemies. .

As described above, the artificial reef (1) according to the first embodiment of the present invention is installed on the coast, the function of artificial reefs as a hiding place, spawning, habitat and nursery of marine life, and installed in rivers, etc. It is equipped with a wide variety of functions such as the function of fish in upstream area, the coastal slope or the seabed slope, and the function of supporting means for preventing erosion.

5 is a perspective view illustrating a plus space artificial fish according to a second embodiment of the present invention, FIG. 6 is a cross-sectional view taken along the line C-C of FIG. 5, and FIG. 7 is a cross-sectional view taken along the line D-D of FIG.

As shown in FIGS. 5 to 7, the positive space artificial island 1 according to the second embodiment allows the water flow to pass smoothly through each side surface of each protrusion 12 and attenuates resistance due to wave force. It is the same as the above-mentioned embodiment except that the side open holes 12A-2, 12B-2, 12C-2, and 12D-2 which communicate with the island 14 are formed, respectively.

And on each upper surface of the projections 12A, 12B, 12C, and 12D, the side openings 12A-2, 12B-2, 12C-2, 12D- are formed by tidal forces formed by tidal currents or wave forces formed by waves. 2) and so that the flow of water flowing through the openings 12A-1, 12B-1, 12C-1, 12D-1 flows upward and attenuates tidal or wave forces, and the flow of water flows smoothly. Same as the above embodiment except that a plurality of blow holes 12A-3, 12B-3, 12C-3, 12D-3 are formed, respectively.

In addition, the artificial edible 1 according to the second embodiment has a bottom for allowing a part of the sea bottom surface to communicate with the fish 14 and be exposed toward the fish 14 at the bottom of each of the protrusions 12 of the main body 10. Through-holes 18 are formed respectively.

As such, the side openings 12A-2, 12B-2, 12C-2, and 12D-2 are formed at each side of each of the protrusions 12A, 12B, 12C, and 12D, respectively, and a plurality of ejection holes are formed on each top surface. By forming 12A-3, 12B-3, 12C-3, and 12D-3, respectively, the fish 14 is formed with side openings 12A-2, 12B-2, 12C-2, and 12D-2, respectively. It can communicate with the outside in all directions through the openings 12A-1, 12B-1, 12C-1, 12D-.

In addition, side openings 12A-2, 12B-2, 12C-2, and 12D-2 are formed at each side of each of the protrusions 12A, 12B, 12C, and 12D, respectively, and a plurality of ejection holes ( 12A-3, 12B-3, 12C-3, 12D-3) are formed respectively, so that in the event of tidal or wave forces, some of the streams hit each of the protrusions 12A, 12B, 12C, 12D, and some of the remaining streams. Dispersion is introduced into each of the side openings (12A-2, 12B-2, 12C-2, 12D-2) so that the strength of the water flow and the flow velocity can be significantly attenuated.

In particular, the flow of water flowing into each of the side openings 12A-2, 12B-2, 12C-2, and 12D-2 is upward through the ejection holes 12A-3, 12B-3, 12C-3, and 12D-3. As it flows out, the strength of the water flow is significantly attenuated.

Therefore, even if a wave force or assistance is generated to apply pressure to the main body 10, the side opening holes 12A-2, 12B-2, 12C-2, and 12D-2 and the plurality of ejection holes 12A-3 and 12B- By 3, 12C-3, 12D-3 attenuating the strength of the wave force, the possibility of conduction of the body 10 can be significantly lowered.

In other words, even if strong wave is generated by swelling wave or typhoon, the incoming sea water is dispersed while passing through each side opening hole (12A-2, 12B-2, 12C-2, 12D-2) and so buoyancy is minimized. By the movement of the main body 10 or loss due to resistance and fall can be prevented.

In addition, the side openings 12A-2, 12B-2, 12C-2, and 12D-2 are formed at each side of each of the protrusions 12A, 12B, 12C, and 12D, respectively, so that the movement of stealth or small fish Not only can it be made smoothly and freely without interference, but also smooth flow of oxygen and plankton-containing water can improve the habitat, growth, and nursery of marine life.

In addition, the bottom through-holes 18 are formed on the bottom of the main body 10, so that a part of the sea bottom is exposed toward the fish 14, thereby providing a more natural environment for marine life. Their survival rate can be significantly improved.

Of the accompanying drawings, Figure 9 is a view showing a plus-space artificial echo according to a third embodiment of the present invention, a perspective view showing a state in which natural stone is provided in the artificial echo.

As illustrated in FIG. 9, the above-described implementation is performed on the upper surface of the main body 10 except that a part of natural stone 50 is integrated to help the seaweed or water plants to slide, and to provide an environmentally friendly environment for growth. Same as the examples. As such, the natural stone 50 is integrated on the upper surface of the main body 10 to reduce the amount of concrete during the manufacture of the artificial edible (1), and seaweed or plankton may easily adhere to the natural stone 50 to inhabit. . In addition, by using the natural stone (50) can improve the sticking rate of seaweed, it is possible to contribute to environmentally friendly and protect the underwater ecosystem.

In the accompanying drawings, FIG. 10 is a view showing a plus-space artificial esophagus according to a fourth embodiment of the present invention, and is a partially enlarged cross-sectional view showing a state in which a natural material composed of sand and gravel is integrated on the surface of the artificial echo.

As shown in FIG. 10, except that the surface of the body 10 is integrated with a natural material 60 mixed with sand and gravel of a size of 2 to 75 mm so as not to be exposed to the outside of the concrete to emit toxic substances. Is the same as the above-described embodiments. That is, the natural material 60 mixed with sand and gravel is integrated on the surface as well as the upper surface of the main body 10. When the size of the gravel is greater than 75mm, since it is difficult to integrate by attaching to the vertical surface such as the side of the main body 10, preferably, gravel having a size of 75 mm or less is used.

In this case, various methods may be provided to integrate the natural material 60 to the surface of the main body 10. For example, when the main body 10 is molded using a formwork, the natural matter 60 may be attached to the inner surface of the formwork and then cured, and the natural matter 60 and the binder may be mixed. The mixture may be attached to the surface of the finished body 10 to integrate.

In addition, although not shown in the drawings, the surface of the main body 10 is roughly processed (eg, roughly molded in advance during sanding or molding), and then the mixture of the above-described natural material 60 and a binder is roughly processed. The surface of the main body 10 may be filled and integrated.

As such, by attaching and integrating the natural material 60 made of sand and gravel on the surface of the body 10, the surface of the body 10 made of concrete is not exposed to the outside, thereby minimizing the emission of toxic substances in the concrete. In addition, the surface of the body 10 may be made of sand and gravel to provide a natural environment for the marine life. In other words, it is possible to provide a habitat environment that can remarkably improve the marine plant survival rate.

11 and 12 are views illustrating a plus space artificial island according to a fifth embodiment of the present invention, and are perspective views illustrating a state where an area extension part is provided in each protrusion of the artificial island.

As shown in FIG. 11, in both upper regions of the protrusions 12, area extension portions 12A-4, 12B-4, 12C-4, and 12D-extend outwardly to expand the attachment area of the adherent. The above-described embodiments are formed, except that a plurality of through holes 12A-3, 12B-3, 12C-3, and 12D-3 are respectively formed to smoothly flow in the up and down directions. Same as

In this way, the area extension portions 12A-4, 12B-4, 12C-4, and 12D- are formed on both sides of the upper portions of the protrusions 12A, 12B, 12C, and 12D, thereby providing a favorable habitat environment for more adherents. It can be provided.

In addition, the area extensions 12A-4, 12B-4, 12C-4, and 12D-4 are connected to each other with the upper region of each of the neighboring protrusions 12A, 12B, 12C, and 12D, as shown in FIG. It may be formed to be. In this case, the areas of the area extension parts 12A-4, 12B-4, 12C-4, and 12D-4 can be secured more widely.

13 is a perspective view illustrating a plus space artificial fish according to a sixth embodiment of the present invention.

As shown in FIG. 13, in the artificial esophagus 10 according to the sixth embodiment, an inner space 72 is formed in the central portion C of the upper surface of the main body 10, and is disposed on the upper surface and each side surface. Same as the above-described embodiments, except that the upper space forming part 70 of the polygons in which the flow holes 74 communicating with the space 72 are formed are protruded upward.

At this time, the inner space 72 of the upper space forming unit 70 communicates with the fish 14 through the fish central hole 16 formed in the central portion C of the main body 10.

As such, the upper space forming portion 70 is additionally provided at the central portion C of the main body 10, so that the habitat environment of marine life can be further expanded, and the small fish including the larvae can be removed from the main body 10. Since the free space can be freely moved through the central hole 16 connecting the inner space 72 of the 14 and the upper space forming unit 70, the activity radius becomes wider.

On the other hand, it is possible to provide a more expanded marine life environment by arranging the artificial seaweed (1) configured as described in each of the embodiments described above in various ways.

That is, in the accompanying drawings, as illustrated in FIGS. 14 and 15, a plurality of main bodies 10 are adjacent to each other so that the marine life habitat and the nursery space 80 are formed between the main bodies 10. Each of the protrusions 12 of 10 may face each other, or the plurality of main bodies 10 may be arranged in four directions so as to maintain a predetermined distance from each other so that the areas between the protrusions 12 face each other.

That is, as shown in Figure 14, each of the main body 10 is arranged in a "╋" type so as to shift each other so that the nursery space 80 is formed between each main body 10, or each main body 10 It is arranged to each of the "x" shape so that the nursery space 80 is formed between each body (10).

As such, the nursery spaces 80 are formed between the main bodies 10 by arranging the plurality of main bodies 10 in all directions, so that the scattering, habitat, and nursery spaces of the fish can be formed on the bottom of the large area. do.

While specific embodiments of the invention have been described and illustrated above, it is to be understood that the invention is not limited to the described embodiments, and that various modifications and changes can be made without departing from the spirit and scope of the invention. It is self-evident to those who have. Therefore, such modifications or variations are not to be understood individually from the technical spirit or point of view of the present invention, the modified embodiments will belong to the claims of the present invention.

1: artificial seaweed 10: main body
12, (12A, 12B, 12C, 12D): protrusion
12A-1,12B-1,12C-1,12D-1: Opening
12A-2,12B-2,12C-2,12D-2: Side through hole
12A-3,12B-3,12C-3,12D-3: Blowout Hole
12A-4,12B-4,12C-4,12D-4: Area Expansion
12A-5,12B-5,12C-5,12D-5: slope for avoiding resistance
14: Fish 16: Fish core
18: bottom through hole 30: fixed pile
50: natural stone 60: natural
70: upper space forming unit 80: nursery space

Claims (11)

A main body including a central portion and four protrusions projecting in all directions with respect to the central portion, the main body being formed in a " + " And an esophagus formed inside the main body and communicating with the central portion and each of the protrusions, and communicating with the outside in all directions by respective openings formed at an end of each of the protrusions.
On each side of the protrusion,
Side openings are formed in communication with the esophagus so that the flow of water flows smoothly and the resistance by the wave force is attenuated.
On each upper surface of the protrusion,
As the water flow introduced through the side opening and each opening by the help or wave force flows upward, a plurality of ejection holes are formed so that the help or wave force is attenuated and the flow of water flows smoothly.
In both upper regions of the protrusions,
An area extension for extending the attachment area of the adherent organism is formed to extend outwardly, or is connected to an upper region of the adjacent protruding portion, and a plurality of through holes are formed to allow the flow of water to flow smoothly in the up and down directions. ,
At each upper end of the protrusion,
Slopes for resistance avoidance are formed respectively,
In the center of the main body,
Is formed in communication with the esophagus, the esophagus center hole through which a fixed pile for fixing the main body to the sea bottom is formed,
In the center of the upper surface of the main body,
An inner space is formed therein, and an upper space forming portion of a polygon formed with a flow hole communicating with the inner space on an upper surface and each side thereof is formed to protrude upward, and an inner space of the upper space forming portion is formed in the air hole. Communicated with the above through
At the bottom of the protrusion of the main body,
A bottom through-hole is formed for each part of the sea bottom surface to communicate with the esophagus to be exposed toward the esophagus.
On the surface of the main body,
In order not to expose the concrete that emits toxic substances, natural materials mixed with sand and 2-75 mm in size are covered and integrated. Filled and integrated into the surface,
The main body is composed of a plurality of each of the main body so as to form a marine life habitat and nursery space between the main body, each arranged in a "╋" shape or each arranged in a "x" shape between each of the main body between Characterized in that the nursery space is formed,
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