For the past couple of years, researchers from California to Alaska have witnessed a warm-water phenomenon mess with the coastline’s marine food web. It’s like watching a horror B-flick unfold: suddenly, a strange miasma emerges, things get weird, and everyone starts behaving differently. Appropriately, a scientist nicknamed this tepid ocean broth The Blob.

“It’s the type of thing you might expect to happen once in a millennium,” says Richard Dewey.

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