An alien-like worm pulsates underwater. | National Geographic Animals

🐚🌊 Meet the Priapulida — the prehistoric-looking marine worm that’s been around since the Cambrian period, over 500 million years ago! These fascinating creatures live buried in muddy sea floors and use their spiny, retractable proboscis to grab prey. Despite their simple worm-like appearance, priapulids play an important role in ocean ecosystems by aerating the sediment and recycling nutrients. They might look a bit alien, but they’re a real-life glimpse into Earth’s ancient past! 🌍✨ #OceanL