Floating through a cloud of fish sperm in the Salish Sea, I watch as one of British Columbia’s most spectacular natural events unfolds in the shallow water below me. 

Moments ago the water was crystal clear, allowing me to note the season’s first kelp growth reaching towards the surface, but now it is a frenzy of fish, eggs and sperm. It is a convergence of life seen only a few times a season on the BC coast and I am glad to be in the thick of it.

Every spring when the weather becomes fickle with hail and sun squalls, this migratory population of Pacific herring moves into the shallows of the Salish Sea, between Comox and Nanaimo, from waters off the west coast of Vancouver Island. In the single largest spawning event in BC, they gather in vast schools adjacent to spawning beaches and when the moment is right they move inshore in an overwhelming frenzy of activity. The females lay thousands of tiny sesame-seed-sized eggs, sticking them to the kelp and rocks. Simultaneously, the males release their milt, or sperm, into the water, fertilising the eggs and turning the ocean a milky indigo blue.

The event has a charged energy to it, drawing in predators as diverse as whales, bears, sealions and wolves to feed on the fish and their roe. It feels like the first good feast of the season after a hungry winter and a turning point to richer months ahead. Herring are the foundation of the BC coast, providing an essential  food source for countless species including the endangered chinook salmon who’s diet is 60% herring.

The herring’s strategy to overwhelm its predators by sheer numbers and dizzying movement is equally effective on me as an underwater photographer. There are usually only a few minutes to see the herring up close in the shallows before they start to spawn and the water turns white with milt, reducing the visibility to zero. In those few short moments, when I should be focused on my camera, I often find myself rendered totally useless by, and in awe of, the spectacle.

But there is one predator who is immune to the herring’s tactics: British Columbia’s industrial fishing fleet. Attracted by this concentration of protein the commercial fleet has brought with it the crash and dim of an industrial scale operation bent on removing as much fish, as fast as possible. Four of BC’s five main herring populations have already collapsed from overfishing, leading the fleet to intensify its focus on this last viable stock.

I have joined efforts with Pacific Wild, a conservation organisation which works to protect wildlife and their habitat in the Great Bear Rainforest. After concentrating primarily on herring campaigns along the northern coast of British Columbia, this season Pacific Wild has turned its attention south and teamed up with local groups Conservancy Hornby Island and Association for Denman Island Marine Stewards.

Collectively, we are calling on Fisheries and Oceans Canada (DFO) to recognise the fragility of this last main herring population and suspend the industrial fishery. It is a daunting task but a critically needed campaign, given the vital role herring play in feeding the coastal ecosystem. 

This year, DFO is permitting an astounding 21,000 tons, or 130 million fish, to be removed from the Salish Sea. This equates to 20% of the total biomass gathered to spawn – and is based on dubious population estimates and management models that have over-predicted the number of herring in the Salish Sea six times in the last 13 years, causing overfishing. Even so, the Federal Fisheries Minister recently reassured British Columbians, saying: “We make our decisions based on science”.