A couple moths ago I picked up a tribal blenny - without doing any research. I know, I know.

So within the last month I've noticed him nipping at various corals. I've also noticed some damage on the base of some sps. Plus I lost a nice paly polyp which was mounted to acrylic plug (might have just came off), and even some damage to a gorg. The weird thing is, they get some damage, then seem to recover. Its like he is eating some then desides he doesn't like it. I looked him up online and they don't appear to be a problem - but I'm pretty sure he's damaging my coral.

He has grown quite a bit, but he hardly eats when I feed - but he does eat some.

I've never had to trap a fish, so I'm wondering how I should go about this...