Mine was nearly 5 inches. They seem to be happy in sandy bottom and they are very peaceful fish. My jawfish loved to dig tunnels(where they live). My biggest mistake was that I added a tomato clown(actually cinnamon tomato clownfish) who killed it so beware of that. Don't place any aggressive fish with it. I fed mine mysis shrimp also. It lived for 3 yrs.It prefers to be fed at least three times per day