Bio Deku Baba

This enemy is found in the Great Bay Temple in Majora's Mask. They are just like their cousins, the Deku Baba, the only difference is when you cut them from their lilypad, they start to crawl around on the bottom of the pool. If you're not already down there, it will just stand down there waiting for you. If you are down there, then they will come after you, hit it with your boomerang fins or any other projectile to eliminate it.