Caught on camera: The world's deepest-dwelling fish five miles under the ocean's surface British scientists have filmed a species of fish said to be the deepest-dwelling ocean animal ever captured on camera. ...the ghostly white Hadal snail fish off Japan’s east coast at a depth of 7,700m.... Incredible: The snail fish survive in total darkness at a depth where the pressure is equivalent to 1,600 elephants standing on the roof of a Mini ...The hadal snailfish...are found below 3.7 miles...in total darkness, near-freezing temperatures and immense water pressure. They feed on the thousands of tiny shrimp-like creatures that scavenge the...