I have 3 common wolves a 12 incher and a 10 incher in a 220 and a 6 incher that grows by the day it seems. i bought the little guy a week ago when i got him he was the same size as 2 TSNs i bought at the same time from TFD and he has are them both. I am in amazment on how fast these critters grow. morale of the story dont be smaller than a wolf or you are sooner or later dinner. I feed them goldfish at least twice a week.