Frilled shark The frilled shark looks like a creature from another era—and in many ways, it is. Often called a “living fossil,” this deep-sea predator has barely changed for tens of millions of years. Even more surprising, its pregnancy can last up to 3.5 years, one of the longest gestation periods known among vertebrates, making this ancient hunter as mysterious as the dark depths it inhabits. #DeepSea #DeepOcean #SeaLife #AbyssalPlain #OceanMystery #Underwater #deepseacreatures #Midwater #Reel