Also known as Molluscs, Giant Honeycomb Oyster, Cockscomb Oyster, Giant Coxcomb Oyster, Razor Oyster, Rock Oyster and Zig-zag Oyster.
Found on reef faces and walls attached to rocks or coral, heavily calcified shell.
They feed on plankton.
Length - 25cm
Depth - 2-30m
Most Bivalves are permanently anchored in fissures or depressions in the rock surface of the reef, some may become covered in algae and other marine life.
Other Bivalves swim free, either by a well developed foot or propelled along by a jet of water from their mantle cavity. (edit)