According to the World Wildlife Fund ... The dwarf lantern shark is the smallest species of shark on the planet. In fact, it is smaller than the human hand and is rarely seen, even in its ocean ...

Largest Shark: The whale shark (Rhincodon typus) is the largest fish in the world, measuring up to [50 feet] long. Smallest Shark: Mature males of the dwarf dogshark (Etmopterus perryi ...