I have had the bubble coral for about a week now. I am able to take the coral out. the ID of the mantis shrimp, I am almost positive that it is indeed a mantis shrimp, after spotting him last night I did all kinds of looking up online to ID him, I like getting hitchhikers but after finding them I do some research to find out what I have. And the coat hanger thing I think that would hurt my coral even more. I don't want to kill him, so what kind of trap are we talking about? thank you for all your feedback