I got a choc chip star when someone online told me they were a sand sifter. They are not. They can eat inverts (snails, crabs, etc not coral) but mine hasn't. I have also found out you should target feed them as they can't fight for food from the fish. One of the better LFS in my area has one in their display and it is very large. They will eat normal fish foods, just make sure to feed them after feeding any fish. Also they are cool, as they are pretty moble, you won't see them in the same spot twice in a row.