|Image: JLplusAL via Flickr|
From Arctic and north Antarctic waters.
The Greenland Shark (Somniosus microcephalus) lives further north than any other shark.
They have a whole host of adaptations for dealing with the cold, not least among them is a slow, lethargic lifestyle which involves them swimming around with all the speed of a glacier.
Must be nice to have an excuse for your idleness!
More on the Greenland Shark.