Jellyfish Trivia

All Water: Over 95% of a jellyfish's body is water, and each cell directly obtains oxygen and nutrients from seawater. No Brain, No Heart: They lack a heart and brain, relying solely on a 'nerve net' spread throughout their body to sense external light and touch. Stealing Stinging Cells: Some animals, like the blanket octopus and the violet sea slug, pluck jellyfish tentacles or eat jellyfish, using the stinging cells as their own defense. Huge Size Differences: The largest lion's mane jellyfish can have tentacles up to 37 meters long, while the smallest Irukandji box jellyfish is only 1 millimeter wide.