Shark

Gunther Hardwicke is part of the team of thieves known as The Terrible Trio. He later adopt the alias Sherman Shackley and wear the mask of a shark. Originally The Terrible Trio were famous inventors in Gotham City, boring rich men seeking thrills and challenges so they became a crimminal band, imposing challenges to the dynamic duo. They wear business suits and masks of animals, they created their technology devices according their respective animal themes. Shark specializes in water or underwater devices, especially in submarines. 

Due to a possibly history of drug abuse he suffers a mental breakdown, thus Sherman trying to reinvent himself faking his own death and attempts to murder his partners. He is stopped by Batman. 
 
He is replaced in the gang by White Shark. 
 

In other media 

 

Television   

 
Batman: the Brave and the Bold 
 
He appears in eleventh episode of the series. He is shown as a boring millionare seeking for thrills. Along with Fox and Vulture, tries to kill their master Wong Fei so they can get the Wudang Tottem in order to invade Hong Kong. Using the powers of the totem, he transforms in a shark humanoid. He is beaten by Bronze Tiger.
 
He uses a massive hammer as weapon.He is a voiceless character.