Dolharbang artificial reefs according to the present invention, the upper block is formed with a face shape on the front and rear; A connection block connected to a lower side of the upper block, the left and right through holes penetrating in the left and right directions, and a front and rear through holes penetrating in the front and rear directions; Is formed in a rectangular plate shape having a horizontal cross-sectional area larger than the upper block or the connecting block is provided with a support plate connected to the center portion of the connection block and a support leg extending downward from each corner of the bottom of the support plate It is configured to include a support block. The Dolharbang artificial reefs according to the present invention have excellent durability since there is no fear of deformation after dropping in water, and there is no fear of loss due to external force such as algae or blue, etc. The beauty is that it can help underwater leisure.
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