The nonprofit Schmidt Ocean Institute recently shared a video of the hairy ocean inhabitant — which it dubbed a “sassy sparkler” — on Instagram. “To describe this polychaete [a type of segmented ...

Deep in the Pacific Ocean, a tiny bright yellow worm called Paralvinella hessleri thrives where almost nothing else can, around boiling hydrothermal vents that gush metal-rich, poisonous fluids. These ...