Sharks don't have adipose fins. They have a second dorsal, just like on a Bass, Cichlid, etc. Adipose fins are present on Catfish, Trout, Salmon, Smelt, Whitefish, some Plecos, etc.
Oh, if it's fresh water than Bull Shark! Imagine the surprise when THAT came up! Dusky Smooth Hounds, known by New York Fisherman as Sand Sharks or Smooth Dogfish, also come in freshwater...but I think tyhat baby Bull could eat a Smooth Hound