KR102068220B1 - Artificial fishing banks for suppling shelter of sea cucumber - Google Patents

Abstract

The present invention provides an artificial reef provided as a hiding place of the sea cucumber, the frame having an opening in which the sea cucumber inhabited and having a curved arch structure to support the upper load of the opening; And a protrusion formed on an outer circumferential surface of the frame along a longitudinal direction of the frame and having an access hole formed therein so as to allow sea cucumbers to enter and exit the opening. The projections are spaced apart from each other so that the legs of the frame can be inserted.
The present invention provides a configuration and its specification in which the legs of the upper frame are inserted into the space between the protrusions of the lower frame surface when the artificial reefs are stacked to provide an extended hiding space. Through this, an expanded space is provided between the upper frame and the lower frame in a two-stage or multi-stage structure, and seaweeds on the outer circumferential surface of the lower frame can be inhabited and additionally hides of sea cucumbers can be formed in the spaces between the lower frame protrusions. There is an advantage to that.

Description

ARTIFICIAL FISHING BANKS FOR SUPPLING SHELTER OF SEA CUCUMBER}

The present invention relates to an artificial reef for sea cucumber hideout of the structure dropped in the sea to provide a space for fish to inhabit.

Sea cucumber (海 피), which belongs to the sea cucumber family, is called sea ginseng, and its popularity is increasing day by day. In addition, consumer demand for high quality seafood is increasing. In particular, sea cucumber is a seller's demand item that is sold at a high price in the Chinese market, and its value is attracting attention as an export strategy.

Sea cucumbers are called blue sea ginseng, black sea ginseng, and red sea ginseng depending on their color, and the color appears different because they eat different foods. Red sea ginseng enjoys algae and turns red, and blue sea ginseng and black sea ginseng mainly eat organic matter in the carcasses and the soil of the fish. Cheonghae ginseng and black sea ginseng swallow organic matter with sand or soil, and then filter and digest organic matter, and excrete sand or soil through anus. If you look closely at the bottom of the sea, you can see that there are traces of crawling sea cucumbers. In the middle of the trail, small sand dunes are accumulated. These sand dunes are traces of sea cucumber excretion after eating the sand at the bottom. The eating habits of these sea cucumbers are compared with the earthworms that purify the land. Therefore, the sea cucumbers, which play a role in helping the sea's self-cleaning, are favored as aquaculture varieties.

The habitat of Cheonghaesam is inhabited by rocks, gravel, and shards in the open sea. Red sea ginseng habitats in the open sea rocks and gravel (temperate, Jeju, Ulleung, Chuja-do, etc.), and black sea ginseng inhabit in eutrophic waters and terrestrial influences. Since the final harvest of sea cucumber is done at sea, it is necessary to prepare enough food and other off-site food at sea. In this regard, the provision of artificial reefs, which serve as habitats for large-scale farming, is emerging.

Artificial reefs are artificial structures that create an environment where fish can live by dropping concrete structures, used ships, and used tires into the sea. When seaweeds attach to and propagate in artificial reefs that have been dropped into the sea, they provide a hiding place for fish and shellfish. Artificial reefs allow people to artificially secure marine resources such as abalone, shellfish, and shellfish such as sea cucumbers. Artificial reefs are composed of artificial structures for increasing fishery resources in coastal waters. Artificial reefs can improve the efficiency of fishing by multiplying aquatic resources and clustering of fish groups, and can also expect the effect of shortening the operating time due to the proximity of fishing grounds.

Artificial reefs are divided into coastal reefs installed within a depth of 20 m and offshore reefs installed at a depth of 20 to 50 m. As the algae strikes the reefs, upwelling and vortices occur, and the nutrients accumulated on the bottom of the sea are suspended to the upper part, creating an environment where various plankton can multiply, thereby increasing the productivity of coastal fisheries.

In addition, artificial reefs are made of concrete, steel, composite materials, etc., and have a wide surface area depending on their structure, and have a surface structure used for coastal algae and marine deforestation, and a skeleton structure, which is mainly used for offshore fish and reefs. It is divided into structural types.

On the other hand, Korean Patent No. 10-0988360 (hereinafter referred to as 'prior art') as a related art related to artificial reefs discloses stepped artificial reefs 10 for shellfish habitat and marine forest formation. In particular, the prior art is provided with an inner space portion 21 formed in a narrow upper portion and a wide lower portion therein, the trapezoidal main body 20 of which both sides are opened and the width is gradually widened as it proceeds downward, Distribution portions 40 and 41 formed on the front and rear surfaces to communicate the outside of the main body with the outside, the flange portion 50 formed at the bottom of the main body to prevent subsidence of the main body, and increase the surface area of the main body. It is formed to protrude side by side at regular intervals to the outer side of the main body, and formed between the ribs 60 and the ribs formed in the upper portion of the main body is gradually settled from the sea water gradually progressing to the end portion An artificial reef with a shellfish form 65 having a space in which shellfish can be collected and at the same time a material is collected and imitation lines 70 fixed to the ribs by a fixing unit is disclosed.

However, referring to FIG. 1, the prior art discloses an embodiment in which a house structure is installed in the main body inner space 21 to form a plurality of spaces. This assists in separating the limited space inside the main body, and it is considered that there is a problem in forming additional space.

In addition, the prior art by configuring the flange portion 50 of the lower, to prevent the stepped artificial reef 10 to sink to the ground. However, in the above structure, when the artificial reefs are stacked to expand the space in the height direction, stress concentration may be generated in a part of the flange part 50, which may cause damage.

Therefore, the necessity of artificial reefs for sea cucumber hiding place having an advantageous structure for stacking is required to easily and stably form additional expansion space to accommodate the population of sea cucumbers growing in a limited space.

In addition, the prior art is provided with the imitation line 70 fixed on the rib (60) to implant the spores or imitation of seaweeds before installation of artificial reef (10) to form a habitat of seaweed in the imitation line (70) The effect was initiated.

In addition, referring to Figure 2, it can be seen that the sea cucumber has a strong habit of inhabiting the concave portion of the stepped artificial reefs. It is determined that this is the basis for designating the shellfish formatting unit 65 in the prior art. The prior art is provided with a distribution unit 40, 41 in the shell form 65. However, if sea cucumbers inhabit at high density on the shellfish breeding section 65, there is a fear that the through-holes of the distribution sections 40 and 41 are blocked.

As described above, the prior document that the imitation line 70 is formed on the rib 60 and the distribution section 40, 41 is not implemented, the distribution section 40 to the shellfish formatting section 65 where high density habitat of sea cucumber is expected. (41) is implemented. For this reason, the possibility that the through-holes of the distribution parts 40 and 41 are blocked can be improved. This may interfere with the movement of organic matter or inorganic matter through the distribution part 40, 41, and may hinder the free movement of sea cucumbers. As such, the conventional artificial reefs are not provided with a structure particularly suitable for the rearing environment of sea cucumbers.

Korean Patent Registration No. 10-0988360

SUMMARY OF THE INVENTION An object of the present invention is to provide an artificial reef for sea cucumber stealth, which can provide an extended stealth space through the stacking of the reefs to accommodate a population of sea cucumbers growing in a limited space.

In order to achieve the above object, the present invention provides an artificial reef provided as a hiding place of the sea cucumber, the frame having an arch opening of the sea cucumber has a curved arch structure to support the upper load of the opening; And a protrusion formed on an outer circumferential surface of the frame along a longitudinal direction of the frame, the protrusion having an access hole penetrating through the frame so that sea cucumbers can enter the opening, and the plurality of protrusions are formed on the outer circumferential surface of the frame. The protrusions are spaced apart from each other so that a portion of the frame of the other sea cucumber silver artificial reef can be inserted and stacked.

Preferably, the frame has an arch structure in which a bottom surface thereof is opened and a longitudinal section of a '∩' shape is extended in a longitudinal direction, and a portion of the frame is inserted into a spaced space between the protrusions and stacked on an outer circumferential surface of another frame.

Preferably, the protrusion may have an inner diameter of 10 to 20 cm.

Preferably, the protrusion may not be formed in the center line in the longitudinal direction from the outer circumferential surface of the frame so that a part of another frame may be inserted and stacked in the center of the outer circumferential surface of the frame.

Preferably, the protrusions may be spaced apart from each other by more than the width of a portion of the frame inserted into the other sea cucumber artificial reefs.

Preferably, the frame has one end in the longitudinal direction is inserted between the protrusions of the first other sea cucumber silver artificial reefs having the same structure as the sea cucumber silver artificial reefs, the other end of the longitudinal direction is the sea cucumber silver artificial reefs It is inserted between the protruding portion of the second other sea cucumber silver artificial reefs having the same structure as, and the first other sea cucumber silver artificial reefs and the second other marine hidden artificial reefs can be arranged in parallel adjacent.

According to the present invention, in order to provide an extended hiding space, when the artificial reefs are stacked, a part of the upper frame is inserted into the space between the protrusions of the lower frame surface and provides a standard for implementing the same. Through this, an expanded space is provided between the upper frame and the lower frame in a two-stage or multi-stage structure, and seaweeds on the outer circumferential surface of the lower frame can be inhabited and additionally hides of sea cucumbers can be formed in the space between the lower frame protrusions. There is an advantage to that.

In addition, the artificial reefs according to the present invention have a higher space efficiency per unit area than conventional artificial reefs installed in a direction parallel to the ground without being stacked, thereby improving the population of sea cucumbers that can be farmed in the same unit area.

1 shows a stepped artificial reef in accordance with the prior art.
Figure 2 shows the habitat of sea cucumbers on artificial reefs.
3 is a schematic diagram of the sea cucumber mixing culture method.
Figure 4 shows an artificial seaweed for sea cucumber silver trust according to an embodiment of the present invention.
5 is an enlarged view of a protrusion according to an exemplary embodiment of the present invention.
Figure 6 shows the lamination of the artificial seaweed for sea cucumber silver trust according to an embodiment of the present invention.

Hereinafter, with reference to the contents described in the accompanying drawings will be described in detail the present invention. However, the present invention is not limited or limited by the exemplary embodiments. Like reference numerals in the drawings denote members that perform substantially the same function.

The objects and effects of the present invention may be naturally understood or more apparent from the following description, and the objects and effects of the present invention are not limited only by the following description. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

3 is a schematic diagram of the sea cucumber mixing culture method.

Referring to Figure 3, sea cucumber mixed culture is a method of planting the structure or artificial reefs in the bottom of the bottom of the submerged fish farm, such as oysters, sea cucumbers and sea urchins as a sea cucumber hideout and discharge the sea cucumbers. In particular, the sea cucumber mixed culture uses the principle that organic matter, excreta, and the body of marine organisms excreted by the heterologous marine organisms that are being dredged are the food of the sea cucumbers. In general, sea cucumber fry grow mainly on diatoms. Since sea cucumber grows more than 3cm, it consumes organic materials, seaweeds, and abalone excrement, and the mixed culture method is an eco-friendly farming technology because it has a low quality improvement effect by ingesting and decomposing organic materials. In addition, sea cucumbers cultured by the mixed culture method may be characterized by a high growth rate compared to natural cultured sea cucumbers due to the abundant food provided from the submerged farms.

In particular, since the placement of artificial reefs is greatly influenced by the depth of water, it is better to avoid the crushed zones in the sea area, and it is judged to maximize the effectiveness of the hideout facility by installing it on the terrain bounded by the flat rocky rocks. It is also possible to secure effective stability by securing about three times the design height measured in the area expected to install artificial reefs. These hideout facilities must be designed in consideration of the characteristics of the sea area, and in particular, comprehensive layout and facility design considering the feeding, movement, excretion, movement, and habitat density of sea cucumbers is important.

On the other hand, if the sea cucumber hideout facility is installed at a depth of less than 5 meters, it is close to the sea surface, causing frequent changes in water temperature due to daily crossover, and if the range of temperature changes includes the activity of the sea cucumber lower or lower temperature, the growth and culture of the sea cucumber Will adversely affect. In addition, when the water depth is low, there is a possibility that organic / inorganic matter discharged from the drop farm may be moved by the seawater algae movement, and the advantages of the sea cucumber mixing culture may disappear. Organic / inorganic emissions from submerged farms tend to have a lower rate of organics at deeper depths. Therefore, if the sea cucumber hideout facility is installed at a depth of more than 15 meters, the arrival rate of organic and inorganic discharged from the drainage farm is low, and thus the growth rate of sea cucumber is difficult to obtain a significant increase. In addition, as the depth of sea cucumber hideout facilities deepens, the difficulty of harvesting sea cucumbers also increases the facilities, maintenance and management of the hideout facility.

Figure 4 shows an artificial reef (1) for sea cucumber silver trust according to an embodiment of the present invention.

In the present embodiment, the sea cucumber stealth artificial reef (1) is a fishery facility that protects and nurtures marine life as an artificial structure. Sea cucumber silver artificial reef (1) plays a role similar to natural rock.In consideration of the ecology of sea cucumber, the artificial habitat of sea cucumber silver trust artificial reef (1) is artificially created and sea cucumber silver artificial reef ( It is the purpose of the introduction of artificial reefs (1) for sea cucumber stealth to grow sea cucumbers with high density by laminating 1). These sea cucumber silver artificial reef (1) is a good habitat of algae that plays a large role in the sea ecosystem, abundant sea algae is a good food for fry and shellfish, and a good spawning ground of fish. In addition, sea cucumber stealth artificial reefs (1) to prevent the strong blue (sea) and currents and to create a vortex to provide abundant dissolved oxygen and fine plankton to be a great resting place for fish and shellfish.

Referring to FIG. 4, the sea cucumber stealth artificial reef 1 may be provided as a frame 11 including a plurality of protrusions 13 raised on an outer circumferential surface thereof. As the plurality of protrusions 13 are formed in the frame 11 according to the present exemplary embodiment, the recesses 15 may be defined as spaces spaced between the protrusions 13 and the protrusions 13.

The frame 11 may have an opening 30 in which sea cucumbers live, and may have a curved arch structure to support the upper load of the opening 30.

The arch structure refers to a curved shape that secures the opening 30 and is capable of supporting a considerable load with compressive stress. In this way, the arch structure prevents tensile stress from acting on the structure. All loads acting from the top to the bottom of the arch structure act as compressive stresses. It is advantageous for materials that are resistant to compression, such as rock, cast iron, and concrete, but weak for tensile, shear, and torsion. Therefore, the sea cucumber silver artificial reef (1) can be made of a concrete material in order to have a strong corrosion resistance to the underwater environment, and a strong resistance to stress.

Description of the opening 30 will be described in detail through the shape of the frame 11 below.

The frame 11 is an arch structure in which a lower surface is opened and a longitudinal section of the '∩' shape is extended in the longitudinal direction, and the legs 11a (FIG. 6) supporting the frame 11 are spaced apart from the protrusions 15. It can be inserted into and stacked on the outer peripheral surface of the other frame (11).

The above-described longitudinal direction means a direction parallel to the axial direction of the frame 11. Accordingly, the leg 11a (FIG. 6) may be understood as an area corresponding to both end portions formed along the circumferential direction of the frame 11 extending along the axial direction. As such, the frame 11 implemented in the shape of a plate-shaped object having a thickness may be understood as a semi-cylindrical shape in which the inner side of the circumferential direction is removed. Accordingly, the opening 30 may mean a space formed by the inner circumferential surface of the frame 11 and other structures.

The legs 11a and 6 according to the present embodiment do not mean a component added to the frame 11, and the frame 11 may perform a function of contacting the lower structure to support the frame 11. Refers to a part of

In the present embodiment, the frame 11 emphasizes the structure of the legs 11a (FIG. 6) to be easily fixed when inserted, and for this purpose, the frame 11 may have an open structure. The spacing of the protrusions 13 defined by the recesses 15 on the outer circumferential surface of the frame 11 is combined with other structures that do not have the same dimensions as the width of the frame legs 11a (FIG. 6) to provide additional hiding space. Can be formed.

The frame legs 11a (FIG. 6) can be easily inserted to minimize the bottom and friction surfaces of nizil. In addition, the frame leg (11a, Fig. 6) may perform a fixing function through the friction force generated from the bottom and the pressure acting on the bottom when the sea cucumber hides sink to the bottom of the nizil.

As described above, the frame 11 having the open structure of the lower surface may provide structural characteristics so that the sea cucumber can easily ingest the organic material in the carcasses or dog soil of the fish and shellfish existing on the bottom.

5 is an enlarged view of the protrusion 13 according to the embodiment of the present invention.

Referring to FIG. 5, a plurality of access holes 130 are formed on the surface of the protrusion 13.

The protruding portion 13 is raised along the longitudinal direction of the frame 11 on the outer circumferential surface of the frame 11 and has an access hole 130 penetrating the frame 11 so that the sea cucumber can enter and exit the opening 30. Can be. A plurality of protrusions 13 may be formed on the outer circumferential surface of the frame 11, and may be spaced apart from each other so that the legs 11a (FIG. 6) of the frame may be inserted.

In the present embodiment, the protrusion 13 may have a flat cross section so that the access hole 130 is formed. Protrusions 13 may be provided with a sufficient space for the sea cucumbers in the space spaced between both sides and the projections (13). The protruding portion 13 may hinder the operation through the net attraction of a small unlicensed basement net or a trawl fishery fishing in a coastal fishing ground due to the nature of the structure.

Protruding portion 13 may be formed in the inner diameter of the entrance hole 130 to 10 to 20cm.

In this embodiment, the access hole 130 may be used as a flow path of organic and inorganic materials and sea cucumbers. Sea cucumber has a strong appetite and active exercise at water temperature below 17, stops eating when it is over 17, and sleeps at summer when it is over 25. Also, in general, sea adults are 10 to 30 cm in length, 10 to 15 cm in thickness, and the weight is about 200 to 300 g. Thus, the sea cucumber stealth artificial reef (1) to protect the sea cucumbers resting in the interior space from predators, spatially isolates the natural enemy of sea cucumbers and the size of the entrance hole 130 not to limit the movement and stealth of sea cucumbers May be required. In addition, the access hole 130 may be formed while maintaining the same inner diameter from the surface of the protrusion 13 to the opening 30 in the frame 11.

In this embodiment, the access hole 130 is located on the protrusion 13, it is necessary to pay attention to its function. Sea cucumbers generally tend to prefer corners or edges. Referring back to the description of FIG. 2 above, when the access hole 130 is located in the recess 15, the sea cucumbers inhabit the recess 15 at a high density to block the entry and exit of the access hole 130. Can be. Due to this, not only is it difficult to protect sea cucumbers from natural enemies, but also reduces the amount of dissolved oxygen in the opening 30 formed inside the sea cucumber silver artificial reef (1) and reduces the effect of providing microplankton to the sea cucumber silver artificial reef (1) May degrade the function.

The protrusion 13 may be formed to extend inward from the inner circumferential surface of the frame 11.

In detail, the protrusion 13 may be formed at a position corresponding to the protrusion 13 and the frame 11 formed to extend outward from the outer circumferential surface of the frame 11. Through this, by increasing the surface area inside the frame 11 it is possible to improve the habitat area of sea cucumbers.

In addition, it may be formed to extend inwardly from the inner circumferential surface in a staggered position with the protrusion 13 formed to extend outward from the outer circumferential surface of the frame 11. In this case, the surface area is increased inside the frame 11 and the access hole 130 is shorter than the frame 11 having the protrusion extending to the corresponding position, so that the sea cucumber can easily enter and exit the frame 11. .

As such, the protrusion 13 may extend based on the outer circumferential surface and the inner circumferential surface of the frame 11, and the position thereof may be selectively changed.

Figure 6 shows the lamination of the sea cucumber silver trust artificial reef (1) according to an embodiment of the present invention.

The artificial reef for sea cucumber silver trust 1 according to the present embodiment may be disposed in parallel with the first other sea cucumber silver trust artificial reef and the second other sea cucumber silver trust artificial reef in contact with the sea bottom. In addition, the frame legs 11a are inserted between the protrusions formed on the outer circumferential surfaces of each of the first and second other sea cucumber silver artificial reefs, and thus may be installed in multiple stages. In this case, the opening 30 spaced apart between the first and second sea cucumber silver artificial reefs and the sea bottom may form the first habitat space 31. In addition, an opening 30 spaced between the frame 11 inserted in the upper portion and the first and second other sea cucumber silver artificial reefs may form the second habitat space 33. In the present embodiment, in order to describe a state in which the plurality of frames 11 are stacked, first and second sea cucumber silver artificial reefs are defined as terms for explaining a structure different from the inserted frame 11.

The protruding portion 13 may not be formed in the center line in the longitudinal direction from the outer circumferential surface of the frame 11 so that the legs 11a of other frames can be inserted and stacked in the center of the outer circumferential surface of the frame 11.

Through this, the artificial reef (1) manufactured to a certain standard may be arranged at the same interval may be repeatedly stacked. In detail, a plurality of artificial reefs in contact with the sea bottom may be arranged in parallel to form one stage. Thereafter, the two-stage artificial reef can be arranged in parallel so that the frame leg is correspondingly inserted in the center of the outer circumferential surface of the adjacent one-stage artificial reef. In the same manner, it is possible to form additional stacked structures such as three stages and four stages. Therefore, excluding the formation of protrusions in the center line in the longitudinal direction from the outer circumferential surface may be understood as a condition for inducing easy stacking of artificial reefs of the same specification.

In addition, the protruding portion 13 of the position closest to the frame leg 11a can prevent the encroachment of the artificial reefs 1 for sea cucumber stealth. In the above-described embodiment of FIG. 6, the outer circumferential surface and the inner circumferential surface of the frame 11 are provided as a sawtooth shape due to the plurality of protrusions 13. In this case, the lateral protrusions 13 in the direction of the frame leg 11a coming into contact with the ground can prevent the frame 11 from completely sinking under load.

In more detail, due to the stacking of the artificial reefs 1, the load may be improved, and the encroachment of the frame 11 located below may be accelerated. It is possible to resist the settlement of the lower stacked frame (11).

The protrusions 13 may be spaced apart from each other beyond the width of the frame leg 11a.

In this regard, the spaced space between the protrusions 13 can be understood as the recess 15. In general, sea cucumbers have a friendly response to artificial reefs. In particular, the red sea ginseng is known to show strong forgery to the artificial reef (1). Therefore, a large amount of sea cucumbers can be inhabited and hidden in the concave portion 15. In particular, the portion 15a of the proposed recess 15 into which the leg 11a of the frame to be positioned at the time of stacking the artificial sea reef 1 for sea cucumber is inserted is a frame for stable insertion of the frame leg 11a. The space can be kept wider than As a result, the stacked artificial reefs may have an additional opening 30 formed between the artificial reefs located above and the artificial reefs located below. Therefore, it is possible to easily form additional space for accommodating sea cucumbers growing in the seabed.

In particular, the growth of sea cucumber depends on the density of habitats under the same conditions. If less than 10,000 sea cucumbers are accommodated, the growth rate of each individual can be improved, but economic problems may arise from low density farming. On the other hand, when more than 15,000 individuals are accommodated, the individual density becomes higher, and thus the growth rate of sea cucumber is lowered and the survival rate is also affected. Therefore, the sea cucumber stealth artificial reef (1) according to the present invention by adjusting the sea cucumber habitat density by using a structure that is easy to stack and expand the artificial reef to accommodate the appropriate population, the number of sea cucumbers available in the same unit area There is an advantage to increase.

Although the present invention has been described in detail through the representative embodiments above, those skilled in the art will understand that various modifications are possible within the scope of the present invention without departing from the scope of the present invention. will be. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by all changes or modifications derived from the claims and the equivalent concepts as well as the following claims.

1: Sea cucumber silver artificial reef
11: frame
11a: frame legs
13: protrusion
130: access hole
15: recess
15a: leg mating space
30: opening
31: First Form Space
33: Second Form Space

Claims (6)

In artificial reefs provided as a hideout of sea cucumbers,
A frame having an opening in which sea cucumbers inhabit and having a curved arch structure to support the upper load of the opening; And
An outer protrusion formed on the outer circumferential surface of the frame along the longitudinal direction of the frame and having an access hole penetrating through the frame to allow sea cucumbers to enter and exit the opening;
The outer protrusion,
Is formed on the outer circumferential surface of the frame a plurality, the projections are spaced apart from each other so that a part of the frame of the other sea cucumber silver artificial reefs can be inserted and stacked,
A recess is defined by a spaced space between the outer protrusion and the outer protrusion and includes a plurality of inner protrusions extending inwardly from the frame inner surface in a staggered position with the outer protrusion,
The frame,
It is an arch structure in which the lower surface is opened and the longitudinal section of the '∩' shape is extended in the longitudinal direction.
Part of the frame is inserted into the spacing space of the protruding portion sea cucumber silver trust artificial reef stacked on the outer peripheral surface of the other frame.
delete The method of claim 1,
The outer protrusion,
Sea cucumber silver artificial reefs that the inner diameter of the entrance hole is 10 to 20cm.
The method of claim 1,
The outer protrusion,
Sea cucumber silver artificial reef not formed in the center line in the longitudinal direction from the outer peripheral surface of the frame so that a portion of the other frame can be inserted and stacked in the center of the outer peripheral surface of the frame.
The method of claim 1
The outer protrusion,
Sea cucumber silver artificial reefs that are spaced apart from each other more than the width of a portion of the frame inserted into the other sea cucumber silver artificial reefs.
The method of claim 1
The frame,
One end of the longitudinal direction is inserted between the outer projection of the first other sea cucumber silver trust artificial reef having the same structure as the sea cucumber silver trust artificial reef,
The other end of the longitudinal direction is inserted between the outer protrusion of the second sea cucumber silver trust artificial reef having the same structure as the sea cucumber silver trust artificial reef,
The first other sea cucumber stealth artificial reef and the second other sea stealth artificial reef is disposed adjacent to each other in parallel.

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