You may have heard of megalodon, the massive prehistoric shark, but what about the bluntnose sixgill? This enormous, ancient shark was lurking in the deep long before its extinct cousin, and still exists today at the bottom of the ocean. It's rarely seen even by scientists. But on a recent submarine dive shark expert Gavin Naylor caught amazing footage of one on camera cozying up to his research vessel, seeming to almost flirt and play with the vessel. Bluntnose sixgills are the oldest living shark lineage. In fact, the sixgill predates most dinosaurs — the species has been around for roughly 200 million years. Some scientists even believe they may have survived the largest mass extinction event, the Permian-Triassic, which killed 96% of sea life. https://www.livescience.com/65985-encounter-with-sixgill-shark.html .............................................................................................................................................................. #science #marinescience #nature #photography #video