Abstract: A structure for the protection of a shoreline by the attenuation of wave energy, the structural features of which facilitate its use as a marine habitat, which includes a plurality of primary and secondary wave attenuation devices collectively and cooperatively disposed in an operative position relative to one another and a shoreline. Common structural features of the primary and secondary wave attenuation devices include an at least partially corresponding dimension and hollow interior bounded by angularly oriented sidewalls and outer walls, which have an apertured construction. Apertures or openings respectively formed in the sidewalls and outer walls facilitate fluid flow through the operatively disposed wave attenuation devices via flow into and out of the corresponding hollow interiors thereof.

Abstract: An artificial reef that will adequately promote marine growth, marine life, and prevent erosion by providing a unique designed and configuration. The artificial reef is a vertical structure having an enclosed top wall, an opened bottom, and at least three side walls for forming an overall geometrical shape. An opening extends through the enclosed top wall and at least one opening extends through each side wall. This design and configuration will provide an optimum means for water flow and provide adequate and efficient stability of the final structure. This will ultimately prevent damage, roll overs, or the like, even during turbulent weather conditions.