If you have a reef tank please stay away from that fish. Every website will tell you how its great for a reef tank, and it does a great job of turning the SB, however it is a killer. They lift the sand really high and start dropping it all over the tank and cover in sand anything that is on the ground. About a week ago my goby killed my pride and joy the brain. That thing rocked, however it was covered with sand, it appears that its mouth was stuffed with it, and it was not able to get it out. It has since then shrunk to bones, and it does not look like it will make it. I tried to clean it, but was not ablet to.