Bacoon is one of Andross's bioweapons in the form of a giant clam, and boss of Aquas in Star Fox 64. Once stationed on Aquas, it began polluting the ocean world. The Star Fox Team was sent to investigate this activity. It's implied that Bacoon is the reason as to why Aquas was now a 100% ocean world and why the islands/ancient civilization sunk below the waves.
When Bacoon first appears, it will reveal its tendons. These tendons must be disconnected by torpedoes. Before the tendons are destroyed, the player may also choose to destroy the three barnacle mortars on Bacoon's shell. If the player is going for the Aquas' Medal, it is very advisable to destroy them, for they each add a hit +3. Once the tendons are destroyed, Bacoon's top shell will collapse, revealing its eye. The eye must be destroyed by torpedoes and is often shielded by a flap of some sort. The flap must be damaged by regular lasers until it disappears, revealing the eye, then a homing torpedo must be fired upon the eye. In addition, the pearl bombs tend to block the torpedoes, and the more damage Bacoon takes, the more pearls it shoots.
- It is widely believed that when Bacoon is defeated, the pollution throughout Aquas goes away.