If I was you I would not get one. These starfish are carnivores. While they may not bother you crabs, shrimps, etc. (probably because they can't get ahold of them) but they will eat on corals and eat the coraline algae off of lr. I have tried to put one in my tank twice. The first time it destroyed all the coraline algae on my lr and ate almost the entire base of my colt coral while I was at work. The second time I put one in my tank he went right for my mushroom polyps so I just took him out. A cool starfish to get instead of that one would be the african starfish. I've read that they are reef safe and know a couple of people who have them and say they have never bothered anything in their tank. They are also very pretty.