1. Jellyfish are made up of more than 95% water.

2. Jellyfish are invertebrates.

3. Jellyfish are basically just a floating mouth and digestive system.

4. Jellyfish have no brain, no blood, and no nervous system.

5. There are more than 200 species of jellyfish.

6. Jellyfish stings are usually harmless aside from pain.

7. The bell-shaped body of jellyfish can not sting.

8. Household vinegar or urine may be used to treat jellyfish stings.

9. Members of Phylum Scyphozoa are the least toxic types of jellyfish.

10. Jellyfish will feed on other jellyfish.