Lion's Mane Jellyfish

The world's longest known animal/Marine Life

The lion's mane jellyfish (Cyanea capillata) holds the record for the longest known animal on Earth, and its trailing tentacles can stretch farther than a blue whale. Found in the cold waters of the North Atlantic and Arctic, it's a reminder that the ocean keeps producing things that feel like they shouldn't be real. Despite its massive size, it's mostly water, about 95%.