Hammerhead (comics)
Hammerhead is a fictional character, a supervillain that has appeared in various comic book series published by Marvel Comics. He is primarily an enemy of Spider-Man and a member of organized crime who exists in Marvel's main shared universe, known as the Marvel Universe. The character first appeared in The Amazing Spider-Man #113.
He is closely associated with the Hammerhead "Family" of the Maggia crime family. Hammerhead distinguishes himself from other villains in that he dresses up and acts somewhat like a gangster from the 1920s. Due to an injury he suffered, much of his skull was replaced with an unbendable steel alloy by Jonas Harrow, giving his head a flattened shape.
Read more about Hammerhead (comics): Conception and Creation, Fictional Character Biography, Powers and Abilities