The Anti-air Missile is a weapon can be equipped to the Sea Fox. When used the Anti-air Missile will shoot upwards, and explode on impact, the missiles can also be fired in an upwards, diagonal direction if they are fired whilst moving. The Anti-air Missile is required to reach Green Island from Lake Rocky and to defeat the boss blocking the entrance to said area.
In other media
The Anti-air Missiles make an appearance in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. In this media, they are one of the weapons for the Freedom Fighters' Sky Patrol. They were first deployed to destroy the War Walrus when it was send to destroy the Sky Patrol.