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).
There is no other species of shark out there that compared to the look of the Hammerhead Shark. Hammerhead Shark Description As mentioned, this species of shark has a head that is wide like the head of a hammer and then the long handle as it goes back to the rest of the body.