Frill Shark-In the Bathypelagic Zone
The deep sea serpent or Frill Shark
The Frill Shark can articulate it's upper jaw. Opening it to a 90 degree angle. It slowly digests larger prey, and has multiple rows of teeth and gets it's "frilly" appearance from it's 6 pairs of gill silits going all the way across it' throat. The mouth has 25 rows of backward-facing teeth around 300 of them. It is virtually impossible to get out of the Frill Shark's mouth once a creature is caught in it's grips.
Picture of a Frill Shark
The Frill Shark
According to the ReefQuest Center for Shark Research, "it's body cavity is elongate and packed with a huge liver perfused with low-density oils and hydrocarbons, making the shark almost neutrally boyant at depth."
Currently, it is unknow how the Frill Shark hunts or feeds.