Toadpoli

Toadpolis were enemies in The Legend of Zelda: Twilight Princess that many beleived to be Octoroks in the game. They appear very rarely in only a few places. Wher ethey can be found include early on in the Goron Mines dungeon and behind the Lake Hylia Howling Stone. They appear as frogs but act very similarly to an Octorok in previous 3d Zelda games. Larger versions of these monsters can be seen swimming underwater like fish in the Goron Mines.

They also bear an appearance and similar attacks as Zolas in the Original Legend of Zelda, and Link's Awakening. Also they bear a resemblance to the Deku Frog. It is possible that they are it's offspring after they go throught the tadpole stage.