I have 125 gallon tank with about 250 pounds of live rock.
First I bought 2 damsels (a yellow tail and a greenish one).
A couple of days later I bought a Purple Psuedo, a Blennie, 2 Peppermint shrimp, and 1 Turbo Snail (that's all the LFS had at the time).
A few days later, I bought 10 more Turbo Snails, 20 Nassarius Snails, 10 Hermit Crabs, and 1 Feather Duster (it looked cool).
When I threw in the Nassarius Snails and Hermit Crabs, the Psuedo starting nipping at them. It pulled a crab out of its shell and ate it before I could stop it.
I tried to capture the Psuedo but had no luck (in a 125 gallon tank with 250 pounds of live rock) - it is nearly impossible to catch a fish without removing the rock.
So I took out the crabs and Nassarius Snails until I decided what to do.
A couple of hours later, I came back and found the Yellow Tail Damsel all bitten up and half dead. I saw the Psuedo chasing it. The Damsel later died.
What do I do about the Psuedo? I thought they were reef safe and not too aggressive. But this one is INSANE. I am afraid it will bully all my other fish and eat all my crabs and snails. It even attempted to eat a Turbo Snail, but that was too big for it.
Any suggestions? I want to get rid of the Psuedo, but I can't catch it and I don't want to remove the rocks.