Researchers say they have spotted the deepest living fish ever found — a sea ghost of a snailfish that floated past their video camera at a depth of 26,716 feet (8,143 meters) in the Western Pacific Ocean's Mariana Trench. The video was captured from the Schmidt Ocean Institute's research vessel Falkor. The expedition team, led by University of Hawaii marine scientists, say the white translucent fish with winglike fins and an eel-like tail represents a previously unknown variety of deep-sea creature. Watch the the rare sea creature in action.