The main fish in the puzzle game Insaniquarium. The main goal of the game is to take care of your Guppies, which drop coins for you.
Guppy (Insaniquarium)
Fish (Other)
for Fish (Other) in Fictional animals by species
Suggested by xylopiano
Obviously, don't nominate any human characters. Hybrids like Cheetah or The Lizard are okay, as are shapeshifters with one set animal form (eg Professor McGonagall.)