Want my advice? Dont get a mantis shrimp. First off, they get rather large and can require a 55g tank, which you probably dont want to get just for one invertabrate. Second, if you DID get the 55, and you put a mantis in, that is it for the tank, since they are very good hunter/killers and will eat mostly any and everything. They live in caves and you might not see it often, and they are notorious as tank breakers.
If your going to do a 55g saltwater and you want a cool fish, get a humu humu trigger or something, not a mantis shrimp.
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