The deep-sea worm Eulagisca gigantea has fascinated social media users with its metallic golden bristles and sharp-toothed mouth, earning comparisons to a sci-fi creature. Native to Antarctic waters and first described in 1939, it remained little known until modern photography revealed its unusual appearance.

Measuring about 8 inches long, the worm features a retractable throat that extends to catch prey, proving it to be an active predator in its frigid habitat. Its distinctive bristles likely aid in movement or protection, showcasing how marine life adapts to harsh and isolated ecosystems.

Part of the polychaete family, Eulagisca gigantea contributes to the health of marine environments by recycling nutrients and supporting the ocean food chain. Its rediscovery online highlights how much of the deep sea remains unexplored — and how even the strangest creatures reveal the beauty and complexity of Earth’s hidden worlds.