Boss Bass is an enemy in Super Mario Bros. 3. He appears in the waters of Water Land. He is red and white huge fish who loves to eat anything in his path. As Mario travels through a level Boss Bass is in the water along with Cheep Cheeps to eat Mario. Even with a Super Mushroom Boss Bass can swallow Mario whole. He can be temporarily defeated by a fireball or Koopa shell. He later appears again in Water World where the whole land will be submerged in water with Boss Bass waiting for you.