My LFS just got some blue crayfish in. I've allways wanted one, I have a 125 gallon tank with 7 angel fish, 8 clown loaches, and 7 serpae tetras. The tank does not have a lid. Could i get away with one of these small crayfish? I know they escape, I plan on getting a lid anyway, but will they harm my fish at all? I'm mostly concerned about the clown loaches.