Fluted clam  (Tridacna squamosa)

The fluted clam, also known as the scaled clam, can be identified by the large, leaf-like fluted scales on its shell (4) (5), which are often used as shelter by organisms such as small crabs, clams, and other invertebrates (6). The mantle is normally brown, generally mottled with vivid green and blue spots or wavy lines (5) (7) (8).