Tiger Shark, originally known as Dr. Joseph Waterman, was a brilliant scientist obsessed with enhancing his physical abilities through genetic manipulation. His experiments led him to merge shark DNA with his own, resulting in his transformation into Tiger Shark. Initially created as a villain to oppose Namor the Sub-Mariner, he has evolved into a complex figure within the Marvel Universe. Over time, he has appeared in multiple comic series and animated adaptations, often serving as both adversary and ally to numerous characters. His motivations range from seeking revenge on those who wronged him to striving for power beneath the waves, making him a versatile foe in the world of Marvel comics.