#20 – Frilled shark
With its lengthened, eel-like body and abnormal appearance, the frilled shark has for quite some time been compared to the sea serpent of mythological lore. It has a broad, flattened head with a rounded and short snout.
With its numerous primitive elements, this rare shark is frequently referred to as a “living fossil.” The frilled shark is one of two surviving types of shark in the family Chlamydoselachidae, with a sporadic dispersion over the Atlantic and Pacific Oceans. It has been found as deep as 5,150 feet (1,570 meters), but it is usually not common deeper than 3,900 feet (1,200 meters).