The frilled shark (Chlamydoselachus anguineus) is an elusive deep-sea predator known for its eel-like body, frilled gill slits, and prehistoric lineage. It inhabits the dark depths of the Atlantic and Pacific Oceans, preying on squid and fish. Notably, it can lunge forward like a snake to capture its prey.

Chlamydoselachus anguineus, commonly known as the frilled shark, is native to the deep waters of the Atlantic and Pacific Oceans. Its geographical distribution spans several regions including the eastern Atlantic from Norway to Namibia, the western Atlantic from the northeastern United States to northern Brazil, the Indian Ocean off India and South Africa, and the Pacific Ocean near Japan, Australia, and New Zealand.

The frilled shark is typically found in deep-sea environments, inhabiting continental shelves and slopes at depths ranging from 50 to 1,570 meters. It prefers cold, dark waters, often residing near the ocean floor. The environmental conditions in these regions are characterized by high pressure, low temperatures, and low light levels.

Chlamydoselachus anguineus occupies a niche as a deep-sea predator. Its elongated, eel-like body and wide mouth allow it to capture and consume large prey items, including cephalopods, bony fish, and other sharks. This species is adapted to its deep-sea habitat with features such as reduced reliance on eyesight and enhanced sensory capabilities to detect prey in low-light conditions.