Dark Blue Moon

Dark Blue Moon resembles a humanoid with aquatic features. He can spin his webbed feet to form a propeller that is capable of creating a giant whirlpool. It is also able to control sea creatures, as seen when it made barnacles attach to Jotaro. Its user is an assassin of Dio who pretended to be a captain of a boat ridden by Jotaro, Kakyoin, Abdul, Joseph and Polnareff. Its scales act as razors.