Remember when barely a million sockeyes showed up in 2009, and after CO2 was blamed, 35 million showed up in 2010?

“Superfish” With Bigger Hearts Equipped to Withstand Climate Change?

British Columbia’s Fraser River hosts more than 100 different sockeye salmon populations, each with its own unique and heroic migration story. But thanks to climate change, its water is becoming warmer, and that could spell doom for some of the fish.

Is B.C.'s sockeye boom a one-off? - The Globe and Mail

In 2009, about 11 million sockeye were expected, but barely one million showed up, sending economic and cultural shockwaves along the coast as commercial, sport and aboriginal fisheries closed.

The disaster of 2009, which came after three years of poor returns, was seen by many as the end of salmon on what had been the world’s most productive rivers.

But then everything changed, and 35 million sockeye came streaming back to the river this summer and fall.