I think jellyfish are outstanding sea creatures. They are beautiful animals. They are made of 95% water! That is 30% more than humans! One amazing feature that they have is that they sting. After getting stung, pain may occur for 1-2 hours, and skin rashes may appear 1-4 weeks after getting stung. Sadly, jellyfish have a short life span. Some species live for a few months, while others live for 2-3 years. They have no brain, heart, bones, teeth, or blood. Moon Jellyfish are the least painful, and Box Jellyfish are the most painful. About 150 million people get stung by jellyfish every year. A tragic fact is that jellyfish dry up quickly when they are washed on shore. Some things jellyfish eat are plankton, brine shrimp, fish eggs, and little fish. These are some incredible facts about jellyfish.