Tiger Shark

Origin

Todd Arliss was once a professional swimmer, until he injured his back while rescuing a man who had fallen overboard from a pirate craft. Todd Arlis was told by the medic he could no longer swim. Dr. Lemuel Dorcas promised Arliss he could help. Dorcas would use the "morphotron" to imprint the genetic pattern of an animal onto a human. He would use tiger sharks on Arlis, but when he tried it, Dorcas also captured Namor's genetic pattern as well as the tiger shark's, transforming Todd into a super human. Dorcas then gave Tiger Shark the costume and the name, who then tried to use him for his own ambitious ideas. However, the Shark escaped to the open sea, and accompanied Lady Dorma down to Atlantis. Shark bullied himself to the throne, until Namor arrived and took it back, sending Tiger Shark to prison. But Tiger Shark escaped when Atlantis fell victim to the Serpent Crown, he swam to Sargasso Sea. 
 
Tiger Shark was starting to lose his powers, so he met Llyra who restored his powers. He and Llyra would face-off against Namor, Stingray, and the Fantastic Four. They both retreated from the battle, but not before Tiger Shark kills Namor's father Leonard Mackenzie.   
 
Tiger Shark would join Baron Zemo' and Egghead's versions of the Masters of Evil.

Tiger Shark again appeared as Namor's enemy when he stole the "Horn of Gabriel" which gave him the ability to summon massive monsters form the deep sea. Tiger Shark is later defeated by the combined forces of Namor and the Mighty Avengers.

Tiger Shark is later seen as a prisoner in Al Kraven's zoo of animal themed superheroes.

Tiger Shark has been seen fluctuating between his human and shark like humanoid forms recently, depending on whether the writer and artist have done their research properly. Continuity? What's that?
 

Tiger Shark gets hired by Norman Osborn to take out Deadpool. With their first encounter on sea, Tiger Shark succeeded in killing Deadpool, but apparently unaware of his healing factor, he left Deadpool stranded on a beach, allowing him to heal. Osborn contacts Tiger Shark again and warns him that if he doesn't bring Deadpool's head to him, he'll come after Tiger Shark. During their second fight, on land, Tiger Shark gets forced down on the ground by Deadpool when suddenly their fight gets interrupted by the police. When Tiger Shark tries to kill Deadpool for the third time, he gets interrupted by Bob, agent of hydra. A third fight between Deadpool and Tiger Shark breaks out in which Deadpool guns down Tiger Shark.

During the Dark Reign, Tiger Shark joins the new Lethal Legion led by the Grim Reaper against Norman Osbourne.

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