Mechanical fish

The Drill Fish is a yellow, submarine-like enemy in the Game Boy Advance game Wario Land 4. They are grey-colored fishes that wear a wooden armor with a drill in the front of it. They also have little pipe om their back and grey fins. Drill Fish only appear in the boss battle against Catbat in the Sapphire Passage. It is found swimming in the water channel in the boss room, swimming back and forth with the intention of harming Wario with it's drill. They can only be defeated with an S-Ground pound.