It's said we know much more about our solar system than we do about the earth's oceans, of which the deepest known point - in the North Pacific ocean - is 35,839 feet deep (if Mount Everest was placed into this trench, it would be covered by 1.2 miles of water).
Take a look at some of the strange and downright freaky creatures that lurk in these deep, dark waters.
The number of Seawolf in the world's oceans is rapidly depleting and it is a Species of Concern according to the National Oceanic and Atmospheric Administration (NOAA).
Despite its fearsome appearance, the Seawolf is only dangerous when defending itself outside the water.
The species lives in incredibly cold water (up to -1°C), at depths of 250-400 feet, and has a natural supply of antifreeze in its body to keep its blood moving freely.
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