TRIDACNA

TRIDACNA CLAM, TRIDACNA SP.

Entangling fingers interlace on the partially closed fleshy mantle of this tridacna clam. The rich soft mantle tissue is patterned with symbiotic photosynthetic dinoflagellate algae. I free-dived to the clam and slowly approached to avoid a pressure wave that would cause the clam to close.

Wakatobi Reef, Sulawesi, Indonesia

Canon EOS 5D Mk II, Canon EF50mm f/2.5 IS macro Lens, 1/160 sec @ f/9.0, ISO 400, video light used to provide illumination, underwater free-diving

by Pam Osborn, Western Australia