Wolf Fish are wolf-like fishes that only appear in the episode, "Dances with Wolf Fish". They were Milo's new roommates until he decided to move back in with Oscar when they decided to eat him.
Milo was in the woods and met up with a pack of Wolf Fish. The Wolf Fish were seen when Milo and they became his roommates and then appeared in the song, The Perfect Roomie. One of the Wolf Fish were dancing, along with Stickler and Milo. After that, Milo decided to move back with Oscar and the Wolf Fish decided to eat them.