My store has had two in the past couple of months, but those two times were the only times I have seen them for sale. The first was small, around 6 inches, and the one we currently have is about a foot and it came from someone's already established 215 gallon tank. It was bullying all of the fish in there, from a moray eel to a huge volitan lion. Awesome fish though, and they do get pretty large (18 inches).