Ocean Networks Canada's #ONCabyss ocean expedition returned to the northeast Pacific Ocean off the west coast of Vancouver Island with a dual-ship operation aboard Canpac Marine Services' motor vessel (M/V) Canpac Valour from July 24–August 4, 2026, and the Canadian Coast Guard Ship (CCGS) John P. Tully from July 25–August 3, 2026. Viewers could watch the operational live dives through ROV Mantis’ cameras from anywhere in the world.

In the first of two planned expedition legs, ONC serviced the North East Pacific Time-series Undersea Networked Experiments (NEPTUNE) observatory off the west coast of Vancouver Island, and conducted ocean-based scientific research. Canpac Marine Services’ remotely operated vehicle (ROV) Mantis served as the hands and eyes of the operation, assisting with the recovery and deployment of scientific instruments and supporting science activities at sea—from the colourful ecosystems of Barkley Canyon to the anoxic waters of Saanich Inlet and more.

Meanwhile, scientists and staff aboard the John P. Tully collected seawater and sediment samples and deployed various instruments, including sediment traps.