Cetopsis Coecutiens or more commonly known as the baby whale catfish! Only get to roughly 12" too? I think they look really like a shark and they swim the exact same way as sharks when there in a frenzy! But ive heard that there very hard to keep with other fish tough? They eat other catfish in the wild? Extremely cool fish and ive seen them here in Ireland before so they must not be not that uncommon?!