This is the goblin shark, a bizarre and rarely spotted creature found in water deeper than 200m throughout the world.
Very little is known about their life history or reproduction, as encounters with them in their native habitat are incredibly rare. Most specimens are dragged up by deep sea fishers.
They are famous for their strangely shaped heads - they have snouts much longer than any other shark, and retractable jaws.
I found out about this and wanted to share it with you guys because that thing is looks scary as hell.
My source for the information tht I copied and pasted is that, "I fucking love science," facebook page, linked here: Source
(I am going to abuse the fuck out of the color links now that I know that exists. lol)