Mine is about 10 inches.got him at about 4 inch. have had him Just about a year now and he grew 6" in that time.... I'm guessing he could have been 8 months old when I got him so believe hes about 20 months old now....Thats a good looking fish how old is he. Mines growing but still small. Maybe 5.5 6 inches. But he loves food. I can get him to stick his head out of there water with his mouth open. Almost like he wants food dropped directly in his mouth.