Also known as Clam, Giant Clam, Gigantic Clam, Gigas Clam, Mollusc, True Giant Clam.
Found on flat coral sand or broken coral over isolated off-shore reefs.
They feed on plankton.
Length - 80cm
Depth - 0-35m
This the giant of clams can weigh up to 200kgs and live in the wild to over 100years!
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) Ref: https://en.wikipedia.org/wiki/Giant_clam