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The Goblin Shark is a bizarre looking fish that occurs near the sea floor in marine waters to depths of about 1200 m. The two short movies below show small specimens in Japan.
This Goblin Shark, which was filmed in an aquarium, was caught in Tokyo Bay, Japan, on 25 January 2007. It died a few days later.
I'm not overly keen on what is happening in this clip, but it shows the amazing extension of the jaws very nicely.