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 smallest shark, a dwarf lantern shark (Etmopterus perryi) is smaller than a human hand.It's rarely seen and little is known about it, having only been observed a few times off the northern tip of South America at depths between 283â439 meters (928â1,440 feet).he smallest shark, a dwarf lantern shark (Etmopterus perryi) is smaller than a human hand.