Thallosoma duperrey - Saddle Wrasse, Blueheaded Wrasse

[Aquattro]

Quinn is correct. The wrasse will not touch the corals, and may not even be interested in the clams. However, any moving crab, shrimp, etc, will become a target.

[saltcreep]

All are right. These will eat pretty much anything that moves (small crabs, shrimp, snails). They just don't seem to take over a tank in the same manner as the T. lunare. I would keep it out of a reef tank unless you feel like sacrificing some pretty inverts.