tridacnidae

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Fluted Giant Clam (Tridacna squamosa)

Also sometimes known as the scaly clam, the fluted giant clam is a species of “giant clam” (Tridacnidae) which occurs in shallow coral reefs throughout the South Pacific and Indian Oceans. T. squamosa can be distinguished from other members of the genus by its large “leaf-like” edges on its shell known as ‘scutes’. It is also noted for having a relatively small byssal opening when compared to other Tridacnids. Despite their size like other bivalve species fluted giant clams are sessile filter feeders. 

Classification

Animalia-Mollusca-Bivalvia-Veneroida-Tridacnidae-Tridacna-T. squamosa

Image(s): Nhobgood

Bear Paw Clam (Hippopus hippopus)

Also known as the horse’s hoof clam or strawberry clam, the bear paw clam is a species of large clam in the “giant clam family” (Tridacnidae). Hippopus hippopus occurs in coral reefs along a large part of the South Pacific ocean and part of the Indian Ocean. Like most clams H. hippopus is a sessile filter feeder.

Classification

Animalia-Mollusca-Bivalvia-Veneroida-Tridacnidae-Hippopus-H. hippopus

Image: Rikaris

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Fluted giant clam (Tridacna squamosa)

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 large, leaf-like fluted edges on its shell called ‘scutes’ and a byssal opening that is small compared to those of 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 across. Sessile in adulthood, the clam’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.

photo credits: Nhobgood

“Boring Clam” (Tridanca corcea)

Also known as the Crocus Clam, Corcea Clam or Saffron-coloured Clam, Tidanca corcea is a species of Tridacnid clam that is widely distributed throughout the west Pacific. Like most bivalves boring clams are filter feeders and will siphon nutrients from the water around them. Despite what its common name might suggest Tridanca corcea is actually quite interesting and will bore itself into hard substrates to keep itself affixed.

Classification

Animalia-Mollusca-Bivalvia-Veneroida-Tridacnidae-Tridanca-T. crocea

Image: Line1