Nature2014-2016North Pacific / West Coast North Americahigh confidence

The Pacific 'Blob' marine heatwave coincided with unexpected die-offs of California sea lions, Guadalupe fur seals, common murres, and Cassin's auklets.

Notes on verification

Confirmed by peer-reviewed research (PLOS ONE), NOAA official Unusual Mortality Event declarations, and independent news/academic sources covering all four named species. [tier=gold indep_score=0.988 clusters=4 claim_tier=notable]

Sources