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A humpback whale tangled up in fishing lines and floats off Prince Rupert, British Columbia, was freed on September 6, after a four-day operation carried out by a specialized team from Fisheries and Oceans Canada, officials said.

This footage shows the crew hooking ropes onto the gear wrapped around the whale and then working to rip or cut off the lines and floats, until finally the massive mammal is free.

Fisheries and Oceans Canada said the whale was “severely entangled” and that the “disentanglement took over 50 rope cuts.”

The department urged people “to report possible occurrences of whales being harassed or disturbed, and instances of collision with whales or whale entanglements.” Credit: Fisheries and Oceans Canada via Storyful