Tridacna Squamosa

Tridacna squamosa, colloquially known as the fluted giant clam, is one of a number of large clam species native to the shallow coral reefs of the South Pacific and Indian oceans. It is distinguished by the presence of large leaf-like fluted edges on its shell called 'scutes' and a byssal opening that is rather small as compared to other members of the Tridacnidae family. Normal coloration of the mantle ranges from browns and purples to greens and yellows arranged in elongated linear or spot-like patterns. Tridacna squamosa grows to 40 centimetres (16 in) across.

Sessile in adulthood, the creature's mantle tissues act as a habitat for the symbiotic single-celled dinoflagellate algae (zooxanthellae) from which it gets a major portion of its nutrition. By day, the clam spreads out its mantle tissue so that the algae receive the sunlight they need to photosynthesize.