I have some aggressive damsels. they kill any small beautiful fishes introducing in my tank. I am planing get rid of them. I tried many ways to catch them. but I failed all the times. next week, I have to use the final option. HOOK THEM. I know it will be risky for the lelf fishes in my tanks. they may be hooked too. But it seems I have no choice if I want to have more small fishes. Any experience here. thanks. dont tell me that I put out all my corals and rocks.