Identification
Permissions for Use
© Jeffrey N. Jeffords. Please remember that all photographs by Jeffrey N. Jeffords appearing on the Animal Diversity Web are copyrighted, and may not be used in any form, even on the Internet, without a licensing agreement. Exception: teachers and educators using the material in a classroom setting, students using this material for school assignments; or anyone for personal, non-commmercial use, such as screen savers. Unauthorized usage is a violation of the Federal Copyright Law. E-mail me for permission to use at this address: 
seaslugs@hotmail.com
Location
Tubba-taha reef, Sulu Sea, Philippines.
This particular variety of clam (Tridacna species), with its brilliant blue mantle, is a common sight on shallow Philippine reefs. It measures about six inches from end to end. In this photo the fleshy mantle is entirely exposed, but patience is required to see the clam in this state-- the clam will abruptly close its shell with only a minor change in light, such as a shadow. Specialized cells called ocelli along the outer edge of the mantle are responsible for light reception.
Jeffrey N. Jeffords (photographer, copyright holder, identification)
