No idea on the clam. It's about a half an inch long from front to back. It's wedged into a hole and has three polyps attached to it's shell. Turning a light on it doesn't help because it only stays open for a few moments after that. It's mantle appears to be black right now, but then again I can't get a really good look at it.

We went down and got a bunch of new things. Three Giant Turbos (A bit larger than a golfball), a Kole Yellow Eye Tang, a Green Clown Goby (the wifes idea), a new Green Pearl Bubble Coral, and a Christmas Tree Rock (Absolutely beautiful).