Jellyfish are some of the oldest creatures on Earth, having lived for over 500 million years. They are simple animals made up mostly of water—about 95%—and they don’t have bones, a brain, or a heart. But despite being so simple, jellyfish are fascinating to look at.
These graceful creatures float through the water like feathers in the wind. Many of them glow in the dark, showing off their magical light. But even though they look delicate, jellyfish can be dangerous. Their long tentacles have tiny stingers that can hurt anyone who gets too close.
If you want to see how amazing jellyfish are, check out these 15 incredible photos. Just remember, it’s best to admire them from a safe distance!
