[Hizikiyah what is the name of that creature? Looks magnificent.
Frilled Shark: The "Sea Serpent" Shark
Frilled Sharks Are Known As "Living Fossils"
The freakish-looking frilled shark is seen so rarely by humans that it makes headlines every time one is found. There’s a lot we still don’t know about this serpent-like deep sea shark.
The frilled shark (Chlamydoselachus anguineus) is one of two extant species of shark in the family Chlamydoselachidae, with a wide but patchy distribution in the Atlantic and Pacific Oceans. This species is found over the outer continental shelf and upper continental slope, generally near the bottom, though there is evidence of substantial upward movements. It has been caught as deep as 1,570 m (5,150 ft), although it is uncommon below 1,200 m (3,900 ft).[2] In Suruga Bay, Japan, it is most common at depths of 50–200 m (160–660 ft). Exhibiting several "primitive" features, the frilled shark has often been termed a "living fossil". It reaches a length of 2 m (6.6 ft) and has a dark brown, eel-like body with the dorsal, pelvic, and anal fins placed far back. Its common name comes from the frilly or fringed appearance of its six pairs of gill slits, with the first pair meeting across the throat.
The frilled shark is so unique that scientists place it in its own family. And though they are usually categorized in the same order as cowsharks (Hexanchiformes), some scientists say the frilled sharks should have a separate order as well.
Like cowsharks, frilled sharks are members of some of the most ancient groups of sharks still in existence. Both have extra gills, big mouths, eyes on the sides of their heads, spineless back fins, and an unusual arrangement of vertebrae.
The fossil record for frilled sharks dates back to 95 million years ago, though some paleontologists believe they are closely related to sharks that lived as long as 300 million years ago. The frilled shark is one of the few sharks adapted to its challenging deep-water habitat. Without the competition faced by sharks living closer to the surface, the frilled shark has retained many primitive-seeming features. As the only surviving species in its family, it’s often called a “living fossil.”
Until recently, only one living species of frilled shark was known to science. But in 2009, it was confirmed that a specimen caught off the coast of Namibia was in fact a distinct species. Named the Southern African frilled shark, this new frilled shark species is slightly smaller than its close cousin, with a longer head and longer gill slits. It’s found from southern Angola to southern Namibia.
I dont believe 95 or 300 million years but however long it hasnt changed in all our evidence of it...