In early August 2016, the OceanGate crew conducted a series of submersible dives with Cyclops 1 near Desolation Sound in British Columbia.
During these dives, team successfully captured close-up video of a sixgill shark and a swarm of dogfish at a depth of 150 meters (490 feet). The sixgill in this video is estimated to be 12 to 15 feet long.
Sixgills are the world's third largest predatory shark: comparable to great white sharks. They are found all over the world but are rarely seen because they typically stay at depths below 200 feet – and have even been seen as deep as 8,000 feet. As a species, sixgills are ancient, having been around since before dinosaurs roamed the earth. The six gill slits are a sign of their age. Less primitive shark species typically have only five gill slits.