Eastern Pacific Gray Whale Population Has Been Halved in a Decade as Arctic Food Chain Collapses

A major investigation published by Inside Climate News on May 24, 2026 revealed that the eastern North Pacific gray whale population has been cut in half over the past decade — from approximately 27,000 individuals in 2016 to roughly 13,000 today — as climate-driven Arctic sea ice loss destroys the benthic amphipod food chain these whales depend on. Twenty-two emaciated gray whale carcasses washed ashore along Washington State's Pacific coastline in spring 2026 alone, continuing a pattern of Unusual Mortality Events first flagged by NOAA in 2019–2020. Scientists at Cascadia Research Collective and the National Marine Mammal Foundation documented that the whales are arriving on their northward migration visibly malnourished, many without sufficient blubber reserves to survive the Arctic feeding season. John Calambokidis of Cascadia Research Collective stated: 'The population is in serious trouble, and this is not part of a normal cycle.' Calf births have fallen by approximately 95%, signalling a reproductive crisis compounding the mortality problem. Unlike the North Atlantic Right Whale, whose declines are primarily caused by fishing gear entanglement and vessel strikes, the gray whale collapse is directly and mechanistically linked to climate-driven Arctic ecosystem disruption: reduced sea ice extent decreases phytoplankton production at the base of the food web, starving the amphipods gray whales sieve from the seafloor. The population had made one of conservation's great recoveries after near-extinction from commercial whaling — reaching approximately 27,000 by the mid-2010s — making its current collapse particularly alarming to scientists who view it as a harbinger of broader Pacific marine ecosystem instability driven by warming.