Off the coast of the Algarve region in southern Portugal researchers at IPMA (the national meteorological, seismic, sea and atmospheric organisation of Portugal) made a mind-blowing discovery. They managed to capture a living frilled shark specimen at 2300 feet.This prehistoric species has the appearance of a real sea monster; with a head halfway between that of a snake and a moray eel. They have dark brown long and thin body of up to 6.5 feet and finally with an ultra brutal technique of trapping its prey (he bends his body before throwing it sharply forward). They have a very flexible jaw filled with 300 tiny, needle-like teeth spread out over twenty-five rows. Typically they will swallow their prey whole and their teeth help prevent the victims escape, they also use their pearly whites to attract prey.In short, they are the kind of aquatic animal that one would not care to run into while diving.The frilled shark usually lives at depths between 1640 and 5300 feet, except in Suruga Bay, Japan, where it is most commonly found at depths of 164 to 650 feet.A female can carry her young inside her for almost three and a half years, which is the longest gestation period of any vertebrate. They are often referred to as living fossils due to the fact that they exhibit several primitive features. It is estimated that they have been lurking in the deep for over 80 million years.