Grey whale numbers have dropped from 27,000 a decade ago to roughly 13,000 — the lowest since the 1970s. Forty-seven have washed up dead on the West Coast this year alone, up from 31 last year. Only 85 calves migrated north in 2026, the lowest count since tracking began in 1994. A juvenile nicknamed "Willapa Willy" was found dead in early April after swimming 20 miles up a Washington river — so shallow that half its body stuck out of the water. Two adults washed ashore at Ocean Shores, Washington, both malnourished, one with an empty stomach. A 42-foot female was found near the Golden Gate Bridge with injuries from a ship strike. These were conservation's great success story — hunted nearly to extinction, then recovered to record highs. Now they're dying again.

1. The Arctic Is Starving Them (Josh Stewart / Oregon State, NOAA Fisheries)

The ice is disappearing, and their food is going with it.

Grey whales eat amphipods that depend on algae that grows under Arctic sea ice — and the ice is vanishing. Josh Stewart of Oregon State's Marine Mammal Institute published research in Science showing grey whale population swings are directly tied to Arctic conditions. The Arctic is warming four times faster than the rest of the planet, sea ice coverage has dropped, and the amphipod populations that whales depend on have declined in key feeding areas like the Central Chirikov Basin in the Bering Sea. Stewart's team found what he called a "pretty good smoking gun" linking the die-off to climate change.

NOAA's own findings point to the same cause. The agency attributed the 2019-2023 Unusual Mortality Event — 690 strandings from Alaska to Mexico — to ecosystem changes in Arctic feeding areas. The whales travel a 10,000-mile round-trip migration that requires massive energy reserves built up in the Arctic. When those reserves don't materialize, the whales show up on West Coast beaches emaciated, with empty stomachs and no blubber. For this camp, ship strikes and entanglement are secondary — the root problem is a collapsing food chain driven by warming that isn't slowing down.

2. Relax, They've Come Back Before (Dr. David Weller / NOAA, Cetacean Specialists)

This species survived commercial whaling. It can survive a food shortage.

Grey whales have experienced boom-bust cycles for as long as scientists have tracked them. Dr. David Weller, who directs NOAA Fisheries' Marine Mammal and Turtle Division, has noted that the population depends on a highly dynamic marine environment and that scientists expect the species to be resilient over time. The population rebounded relatively quickly from a previous mass mortality event in 1999-2000. Before that, it recovered from being hunted to fewer than 2,000 individuals to nearly 27,000 by the mid-2010s. Three major mortality events have hit the population since the 1980s, reducing it by up to 25 percent each time, and each time it came back.

But even the optimists are hedging. Weller himself has acknowledged that the duration and magnitude of the current decline, combined with persistently low calf production since 2019, raise concerns about whether the population can sustain its historical resilience. The 85 calves counted this year are the lowest since records began. Research spanning 30 years shows clear links between food availability, body condition, and reproduction — and all three indicators are pointing the wrong direction. The question isn't whether grey whales can bounce back in theory. It's whether the Arctic will give them anything to bounce back to.

3. Maybe Also Let's Stop Hitting Them With Ships (Pacific Whale Foundation, Science Journal Research)

They're starving AND getting run over. Less than 1 percent of high-risk zones have speed limits.

Ship strikes are killing whales that are already weakened by starvation. At least three grey whales in the San Francisco Bay Area were killed by vessel strikes in 2025 — more whale deaths than the Marine Mammal Center has responded to since the 2019 mortality event. The Golden Gate Bridge whale in March showed injuries consistent with a ship strike despite being in fair body condition with evidence of recent feeding. Globally, an estimated 20,000 whales of all species are killed by ship strikes annually.

The management response is nowhere near the scale of the problem. Research published in Science found that mandatory speed restrictions cover only 0.54 percent of collision-risk hotspots for blue whales and 0.27 percent for humpbacks. Less than 7 percent of high-risk zones have any mitigation measures at all. Full coverage could be achieved by expanding management over just 2.6 percent of ocean surface. For grey whales already weakened by Arctic food loss, a ship strike that a healthy whale might survive becomes fatal. The entanglement problem is similar — whales caught in abandoned fishing gear can carry it for months, slowly exhausting themselves across thousands of miles of migration.

Where This Lands

The climate researchers are right that the primary driver is Arctic ecosystem collapse — you don't lose half your population in a decade from ship strikes alone. The resilience camp is right that grey whales have survived mass die-offs before, but even they acknowledge the current trajectory is different: the longest sustained decline on record combined with the lowest calf count ever. The maritime safety advocates are right that speed limits and shipping lane changes could prevent secondary deaths, but they'd be treating symptoms while the food chain unravels. Where this lands depends on whether the Arctic eventually gives these whales enough to eat.

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