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 rest of a goblin shark's body is flabby with transparent pinkish skin from the blood vessels that shine through. Averaging around 12 feet (3.6 meters) long, goblin sharks are hefty creatures, weighing in at about 400 pounds (181 kilograms) [source: Florida Museum of Natural History].