Contact Blog Project Noah Facebook Project Noah Twitter

A global citizen science platform
to discover, share and identify wildlife

Join Project Noah!

Small Giant Clam, Maxima Clam

Tridacna maxima


The small giant clam is less than a third of the size of the true giant clam (Tridacna gigas). As an adult, it has a large shell that adheres to a rock by its byssus, a tuft of long, tough filaments that protrude from a hole next to the hinge of the shell. When open, the bright blue, green or brown mantle is exposed and obscures the edges of the shell which have prominent distinctive furrows. Source:


The small giant clam has the widest range of all giant clam species. It is found in the oceans surrounding east Africa, India, China, Australia, Southeast Asia and the islands of the Pacific.


Dive and Trek house reef, Batangas, Philippines

Species ID Suggestions

Sign in to suggest organism ID

1 Comment

textless 8 years ago

what a pretty animal!

Eric Noora
Spotted by
Eric Noora

Batangas, Philippines

Spotted on Sep 11, 2011
Submitted on Sep 16, 2011

Spotted for Mission

Related Spottings

Tridacna sp. Large saltwater clams Maxima Clam giant clam

Nearby Spottings

Fluted Giant Clam Giant Clam, Gigas Clam Graeffe's Sea Cucumber Bubble Coral