Inside Giant Clams - 10/27/15
Tridacna gigas, the giant clam of the Indo-Pacific, is the largest bivalve mollusk on Earth and the world's only sun-powered clam. It hosts a thick layer of zooxanthellae in its tissues and gets up to 90 percent of its nutrition from their photosynthesis.
Imagine if we could do that? Just stand outside on a sunny day and photosynthesize? That's pretty close to a free lunch.