Boss Bass is a huge fish that appears in the waters of Water Land. He is red and white. 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.