13 June 2017 / National Geographic / Craig Welch
Event

Bizarre, Glowing Sea Creatures Bloom in the Pacific

Gulf of Alaska, United States

Tropical, tube-shaped animals called pyrosomes, known as "fire bodies,"; appear by the millions off the Pacific Northwest and Alaska. No one knows why.


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Marine invertebrates called pyrsomes are appearing in record numbers in areas where they had rarely been seen before. (Photograph by Steve Morey)