Also known as Caribbean Amber Penshell, Oyster, Pen Shell.
Found buried in mud, sand or recesses in the reef, with just the valves slightly exposed, over coral and rocky reefs. Often found encrusted with organisms which may be for camouflage.
They feed on plankton.
Length - 30cm
Depth - 0-15m
Widespread Western Atlantic, Caribbean, Western Central Pacific
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. Ref: https://en.wikipedia.org/wiki/Pinna_carnea