Jellyfish

These odd animals are ancient, adaptable, and in some cases might be immortal.

Take a few moments to revel in these fun facts about jellyfish. You might be surprised by what you don't know about these oddly charismatic gelatinous creatures.

1. They Predate the Dinosaurs by Hundreds of Millions of Years 

2. They Like How We're Changing the pH Levels of the Oceans 

3. They Aren't Really Fish; They're Gelatinous Zooplankton 

4. They Are 98% Water, Without a Brain or a Heart 

5. But Some Have Eyes 

6. Some Might Be Immortal 

7. They Poop Where They Eat 

8. A Group of Jellyfish Is Called blooms, swarms or smack

9. They Are Among Earth's Deadliest Creatures 

10. They Range Widely in Size 

11. Some Are Edible 

12. They Have Been to Space 

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