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).
Not to be confused with whitetip reef shark. The Oceanic whitetip shark (Carcharhinus longimanus), also known as Brown Milbert's sand bar shark, Brown shark, Nigano shark, Oceanic white-tipped whaler, and Silvertip shark, is a large pelagic requiem shark inhabiting tropical and warm temperate seas.he oceanic whitetip shark is a medium-sized requiem shark. The largest specimen ever caught measured 4 m (13 ft), an exceptionally large size considering few specimens are known to exceed a length of 3 m (9.8 ft). The maximum reported weight is 170 kg (370 lb).