Bacoon

Bacoon was a massive Bio-weapon created by the evil Andross during the events of Star Fox 64. It was a giant mutant oyster that was responsible for polluting the water planet of Aquas.

A single one appears as the Aquas boss in the game, her stage being Terror of the Deep. She is unique amongst bosses: Fox McCloud fought and defeated her using the combat sub Blue Marine, partially because she was an aquatic boss.

In battle, the Bacoon defends herself by spewing clouds of pearl bombs and by spawning serpent mutants from the three siphons on top of her shell. The weak points are the two muscles that hold up the shell that she closes. Shoot them until they tense up and turn rainbow colored, then fire a Homing Torpedo to disintegrate it. After both muscles are severed, the top part of the shell falls behind the rest of the body. The Bacoon's weak point is now her eye, which she fiercely protects by pumping out pearl bombs at full speed. Shoot the eyelid to expose the eye and hit it with a torpedo. Three torpedoes to the eye will kill the boss.

The Bacoon is resurrected in Star Fox 64 3D, becoming a boss once more.