Abstract: An artificial reef assembly construction is disclosed which comprises, in combination, an artificial reef assembly comprising a plurality of reef units each comprising a hollow structure and a predetermined number of floaters, each floater comprising a body casing having an inner chamber partitioned so as to be fluid tight by means of at least one partition wall to have a plurality of air chambers, the floaters being releasably secured into the hollow structures of reef units, at least one of the plurality of air chambers having at least one openable portion. The artificial reef assembly construction with its floaters filled with air can be floated on the surface of the sea and easily towed to a desired location, where by only opening at least one openable portion of of at least one of the air chambers the artificial reef assembly can be easily submerged while causing the floaters to be automatically released from the artificial reef assembly.

Abstract: A novel artificial reef unit comprising a hollow structure with its peripheral framework having oblique lattice pattern windows arranged in specific relationships with fiber-reinforced plastic bands in the framework is found to be durable in the marine environment and extremely effective for gathering fish, shellfish and the like. Representative of the specific relationships include requirements that the peripheral framework of the hollow structure has a total band surface area of 15 to 50% based on the imaginary entire surface area of framework and that the windows in the framework each have an open area of 0.1 to 0.8 m.sup.2.