A restoration cap unit for construction of eco-friendly structures in a body of water is provided, which is constructed from materials including a primarily calcium carbonate material; and a cement that is capable of holding the primarily calcium carbonate material, wherein the restoration cap unit has a first side and a second side which are attached at an edge to form a tent shaped structure, such that the restoration cap unit is configured to be placed on top of an existing restoration assembly to extend the height of the restoration assembly.

Disclosed herein is a substrate structure (1) for a tank (12) for crustaceans, wherein the substrate structure comprises at least two support gratings (2) arranged parallel to each other. The substrate structure further comprises at least two interspacing units (3) arranged between the two support gratings for spacing the two support gratings at a distance of at least 20 mm, such that at least two floors (4) are formed, which provide support for the crustaceans. Further disclosed are a tank entity (11) comprising the substrate structure and use of the substrate structure for holding crustaceans.

Disclosed herein is a substrate structure (1) for a tank (12) for crustaceans, wherein the substrate structure comprises at least two support gratings (2) arranged parallel to each other. The substrate structure further comprises at least two interspacing units (3) arranged between the two support gratings for spacing the two support gratings at a distance of at least 20 mm, such that at least two floors (4) are formed, which provide support for the crustaceans. Further disclosed are a tank entity (11) comprising the substrate structure and use of the substrate structure for holding crustaceans.

An estuarine fisheries habitat restoration three-dimensional device includes a plant floating bed region, a pipe reef region, a gabion mesh box region and a stainless steel frame structure. The estuarine fisheries can provide diversified habitats for different kinds of aquatic organisms by constructing a three-dimensional restoration device including the plant floating bed region, the pipe reef region, and the gabion mesh box region.

An estuarine fisheries habitat restoration three-dimensional device includes a plant floating bed region, a pipe reef region, a gabion mesh box region and a stainless steel frame structure. The estuarine fisheries can provide diversified habitats for different kinds of aquatic organisms by constructing a three-dimensional restoration device including the plant floating bed region, the pipe reef region, and the gabion mesh box region.

A concrete wave attenuating apparatus facilitating the formation of a vertical oyster reef includes: A) A concrete wave attenuating frame having i) a concrete frame top and a concrete frame bottom defining a periphery of the frame, each having corners and sides extending between the corners, ii) concrete corner posts extending generally vertically between generally aligned corners of the concrete frame top and the concrete fame bottom, iii) concrete sides between the concrete corner posts extending generally vertically between the generally aligned sides of the of the concrete frame top and the concrete fame bottom, a plurality of passages extending through the concrete sides; B) A space defined within the concrete wave attenuating frame, wherein the plurality of passages extend to the space; and C) optionally Cultch material within the space.

A concrete wave attenuating apparatus facilitating the formation of a vertical oyster reef includes: A) A concrete wave attenuating frame having i) a concrete frame top and a concrete frame bottom defining a periphery of the frame, each having corners and sides extending between the corners, ii) concrete corner posts extending generally vertically between generally aligned corners of the concrete frame top and the concrete fame bottom, iii) concrete sides between the concrete corner posts extending generally vertically between the generally aligned sides of the of the concrete frame top and the concrete fame bottom, a plurality of passages extending through the concrete sides; B) A space defined within the concrete wave attenuating frame, wherein the plurality of passages extend to the space; and C) optionally Cultch material within the space.