alrighty! thanks for the info Tropical North.. so now that we know that it is not, in fact a grouper, but a GOBY that makes me happy. I learned that they only get about 2.5 inches in captivity and they will live in fresh or brakish water. They are perfect for our tank. We really wanted a fish that would live mid to upper levels but another bottom dweller is ok too. I think it's a great fish!