No need to yell....remember fish tend to go down quick in a matter of hours(generally) ..which in this case will make it better for you..keep a close eye on him. Remember fish are great weather predictors. We here in Michigan have had many fronts go through which has effected how my fish are acting... When I had mine(dog face) he did strange things also. Napping (turning dark) curled up in the rocks. I wouldn't panick yet. And remember he will only eat when hungry you run a better chance of contaminating your water then over feeding him.
I hope he is okay.
Kim
[ December 31, 2001: Message edited by: Kimmisue ]