This is my favorite fish. I've had this fish for approximately 8 years now. He was only about 2-3" when I got him. He started out in a 46 gallon bow front, but quickly outgrew it so I got a 75 gallon to keep him in. I know now that the 75 gallon is also a bit to small for his full grown size, but at almost 8 I'd think he's full grown at 10" long.