Saltwater aquariums?

[flyingmonkeypoop]

The whole thing came out. And it wasnt really metalic but more like a sheen I guess. I havent seen them again yet but I have a large pair of tweezers sitting by the tank just in case. I also have another mystery creature. I noticed it on a peice of rock and thought it was a sponge or crazy algea but its not. It is lime green and it moves like a snail and it almost looks like a snail curl in the center (its brown and curly) but it has the squishy green stuff all over it and a black foot.