As I notice some coral decaying I took a red light and looked through my tank a couple of nights. I found a black-clawed crab in the tank that I didn't add so I'm thinking he was a hitchhiker when I got a couple of new coral from my local Petco.
I also noticed later on that my red starfish was all beat up and missing some arms. So my question is would a black clawed crab do this? I've tried getting him out of the tank but he is a tough one to get out also when I do get him out should I bag him up and bring him to petco or put him in my other tank or let him die? He seems to be a pest. I'm pretty sure he is the reason for the prolong death of a couple of corals now. Hope to hear back from someone.