Jellyfish are much like sea anenomes . 90% of the jellyfish is water. The most common jellyfish living in North America is the "moon jelly." It gets up to nine inches in diameter.	When jellyfish die they are still able to sting because of a natural reflex. Most jellyfish have poison. Some types of jellyfish poison can send you into epileptic shock.
Although having a powerful sting the jelly fish's natural enemy is the centephus.	One jelly fish that has a very original name is the "Giant Jellyfish" with tentacles reaching up to 200 ft long.That's more than half a football field!

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