A marine researcher says he has video evidence of the first recorded shark in the Antarctic Ocean.

The deepest known sighting of an octopus has been captured on film, more than a mile deeper than the previous reliable sighting. Researchers believe the creature is likely to be a new species of Grimpoteuthis, or "Dumbo octopus," a genus of deep-sea umbrella octopuses named for their fins, which resemble the ears of Disney's cartoon elephant. Over the course of a year and a half, as part of the Five Deeps Expedition, scientists visited the world's deepest places. And this thing just comes out of the darkness, which just crawled up to the cameras -- another Dumbo octopus," Jamieson, CEO of deep sea exploration company Armatus Oceanic, told CNN. "I like the fact that it challenges people's perceptions about what deep sea animals look like," he said.