In July 2018, Oceana Canada, the Haida Nation, Fisheries and Oceans Canada, and Ocean Networks Canada set off on an exciting expedition to explore the seamounts near Haida Gwaii, British Columbia. Onboard the Nautilus, a state-of-the-art research vessel, the team used remotely operated vehicles (ROVs) to map 13 seamounts. Six of the mapped seamounts were new discoveries, significantly expanding the known size and area of these underwater mountain ranges. These incredible underwater mountains pro