Aquamarine Bill

Aquamarine Bills are variants of Mad Bullet Bills and are EXTREMELY dangerous. They fly extremely fast, and the cannons they are shot from are not seen at all. The Aquamarine Bills are totally diffrent variants from Mad Bullet Bills, because they actually are green/aquamarine in color, and have aquamarine/green color sorrounding them. The heat-seeking counterpart to this enemy is the Void Bill.