The footage, shared by marine research organization OceanX, captures a rare encounter with a bluntnose sixgill shark — a species so ancient it predates most dinosaurs. The video has quickly gone ...

But a handful of shark lineages persisted. By the Early Jurassic Period (195 million years ago) the oldest-known group of modern sharks, the Hexanchiformes or sixgill sharks, had evolved. They were ...

"In 2021, we had a recreation fisherman catch a sevengill shark and because people didn’t realize they were here or in the area, someone reported it and said it was a sixgill shark and the rules ...