What is the largest species of jellyfish?

The largest species of jellyfish is the lion’s mane jellyfish (Cyanea capillata), which can have tentacles that reach up to 36.5 meters (120 feet) in length, making it the longest known animal on Earth. Found in the cold waters of the Arctic and North Atlantic Oceans, lion’s mane jellyfish are known for their striking appearance and long, flowing tentacles. Despite their size, they are not dangerous to humans, though their stings can cause irritation to those who come into contact with them.