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).
The great white shark is an exceptionally large lamniform shark found in coastal surface waters in all major oceans. Reaching lengths of more than 20 ft and weighing up to 4,938 lb, the great white shark is arguably the worldâs largest known predatory fish. It is the only surviving species of its genus.