Canada's Pacific patrols catch illegal shark finning, dolphin slaughter on high seas

On the high seas between Victoria and Tokyo, industrial fishing vessels are operating with impunity—until Canada shows up. Over two months this summer, a Canadian Coast Guard ship and enforcement officers from three allied nations boarded thirty vessels and tracked hundreds more, documenting a catalog of violations that reads like a manual of marine destruction: sharks caught with illegal gear, their fins severed while the animals were still breathing, then tossed back into the ocean. Dolphins harpooned and butchered into chunks to serve as bait. Fish rendered into oil so thoroughly that inspectors cannot determine whether the catch was legal. Crews living in conditions that would violate labor standards on land.

This was Operation North Pacific Guard, the fourth consecutive year Canada has led a multinational enforcement mission into international waters. The Sir Wilfred Laurier, based in Victoria, spent fifty-six days covering more than ten thousand nautical miles. A Canadian aircraft—a Dash-8 usually stationed in Campbell River—flew thirty-one patrols totaling forty-two thousand nautical miles, tracking three hundred forty-four vessels and providing video evidence to boarding teams. The operation found fifty-two potential violations of international fishing rules. Most of the offending vessels were part of Asian distant-water fleets, flagged to China, Taiwan, Japan, Korea, and Russia. More than eleven hundred vessels are registered to fish in the North Pacific's high seas; roughly four hundred were operating during the patrol window in late May and mid-July.

The scale of the problem is staggering. Sean Wheeler, chief of international enforcement for Fisheries and Oceans Canada, described some vessels as "very significant"—factory-size ships carrying sixty to eighty crew members with enormous capacity for illegal activity. Large Russian ships equipped with fish-oil-rendering tanks exceeding seventy thousand liters have become a particular concern. The rendering process makes it impossible to inspect what species were actually caught, obscuring whether protected or out-of-season fish ended up in the tanks. Last year, the legal catch in the North Pacific exceeded seven hundred thousand metric tonnes. If even a fraction of the industrial fleet is engaged in illegal operations, the ecological damage compounds rapidly.

The human toll surfaces in the specifics. A Taiwanese fishing boat captain was sentenced to more than two years in prison for harpooning forty-three dolphins used in shark finning operations. That conviction emerged from evidence gathered during previous Canadian patrols. Wheeler said the sentence represents a rare moment of accountability—a signal that captains might face real consequences. The number of dolphin kills appears to have dropped this season compared to previous years, though Wheeler cautioned it is too early to declare a trend. No Pacific salmon were found aboard any inspected vessel, which Wheeler called "very positive," given that fishing fleets were banned from taking salmon starting last year.

What makes this year's operation notable is not just what was found, but what appears to be changing in the behavior of fishing captains. Canadian officials reported "significant signs of awareness" that Canada conducts enforcement patrols. Vessels were observed adjusting their operations, apparently in response to knowing that Canadian boarding teams might appear. This behavioral shift—the knowledge that someone is watching—may be the most consequential outcome of sustained enforcement. Wheeler acknowledged that shark violations remain "problematic" and that dolphin captures continue, but he expressed hope that the prison sentence handed down to the Taiwanese captain will have a deterrent effect in years to come.

The operation involved nineteen DFO fishery officers, with five participating in air surveillance based in Japan. This year marked the second year that Japan deployed a fishery officer to the Canadian patrol vessel and the first year a Canadian officer joined Japan's high seas patrol. The partnership reflects a shift in how enforcement happens on the open ocean—no single nation can police waters beyond the two-hundred-nautical-mile limit, so Canada works with flag states to support investigations, fines, and potential sanctions. Photo and video evidence is shared with international fisheries organizations, creating a paper trail that can lead to prosecution.

The mission also conducted a high-seas rescue on June twenty-sixth, responding to a distress call from a sailboat about fifteen hundred nautical miles southwest of Adak, Alaska. Three Canadians were aboard. The rescue interrupted the enforcement operation but underscored the Coast Guard's dual mandate: patrol and protect.

Canada's involvement in North Pacific enforcement began in 2019 and has been led by Canada since 2021. Officials say the patrols are making a dent in a problem that undermines fish populations, marine ecosystems, fair markets, and global seafood supply chains. Whether the deterrent effect will hold—whether the knowledge of Canadian presence will be enough to change behavior across a fleet of more than a thousand vessels—remains an open question. But for the first time in years, some captains appear to be thinking twice.