Uploaded July 2026 | Updated September 2026, 3 weeks ago

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Under the ice in Antarctica is a world few people ever get to see. Bizarre creatures—ancient sponges, gigantic jellyfish, sea spiders, ribbon worms, and notothenioid fishes that manage not to freeze—make their home here.

Originally published in 2020 on ‪‪‪‪@pbsterra 🇦🇶

Arlo and Caitlin learn that the Antarctic marine realm is not only spectacular to see, but fascinating for scientists to study. So how do Antarctica’s fish, which penguins and seals rely on for food, survive in waters below their freezing point?

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