Epidemiologists study outbreaks of diseases, the causes, locations, and how various communities are affected, utilizing relative information to aid in the prevention of future outbreaks. Epidemiologists help to keep the public informed of methods to maintain and improve public health.
Based on these criteria, the smallest known extant shark species appears to be Etmopterus perryi, males of which mature at 16 to 17.5 cm TL and gravid females have been found at 19 to 20 cm TL (Springer & Burgess 1985).
Shark size varies according to the species. The largest shark is the whale shark which is up to 41 feet long. The great white shark is up to 20 feet long. Bull sharks can reach up to 11 feet.Tiger sharks can measure between 10 to 14 feet.he largest shark is the whale shark which is up to 41 feet long. The great white shark is up to 20 feet long. Bull sharks can reach up to 11 feet.