what does everyone here think of crabs. right now in my tank i have 3 emerald crabs, and a sally lightfoot. i kind of have a feeling that they are becoming destructive in the tank as far as fighting with the cleaner shrimp and whatnot. I'm not so sure that i feel safe leaving them in the tank anymore only because i have seen them more than once try to grab at a passing fish. do you think that i should consider finding them a better home? they are definately an interesting part of the tank to watch interact, but i do not want to let them become a threat to anyone else. also consider that i will be remodeling the tanl to incorporate polyp corals in a few weeks, so take that into consideration as well.