Spondylus varius, Molluscs, Thorny Oyster, Orange-mouth Thorny Oyster.
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Also known as Spondylus varius, Molluscs, Thorny Oyster and Orange-mouth Thorny Oyster.
Found on coral and rocky reefs,usually attached to back walls of caves and overhangs.
Patterns and colours vary from place to place.
They feed on plankton.
Length - 20cm
Depth - 15-40m
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.
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