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Usually found in deep water, the adult gargoyle cusk eel is extremely rare and represents the only member of its genus.

Mike and I groan, thinking back on all the time and energy we’ve wasted chipping out iced-over cusk lines with crowbars.

The Nautilus team just discovered a whale skeleton on the seafloor covered in bone-eating worms, cusk eels, and octopus devouring this massive deep sea meal.

Jeff Milisen, a professional photographer who is based in Hawaii, captured several stunning images of rarely seen creatures that make their home in the depths of the ocean, including black cusk eels and sea butterflies.

The data puzzled biologists, who compared the cusk eels and other species to "Olympic athletes" for their unique abilities to survive in such brutal conditions.