1. The Jellyfish has no working heart, brain or eyes. The Jellyfish actually has sensors surrounding the bell (or main part) of the Jellyfish. These sensors sense if the jelly is going up or down, or if it is light or dark.
2. The Box Jellyfish is the most poisonous Jelly in the world- its toxin (poison) can kill even a human.
3. The Jellyfish lives in every ocean in the world and in some freshwater lakes.
4. The tentacles of a jellyfish are its main source of protection. They contain the toxins, which contain nematocysts (nee-MA-toe-SYSTS) which fire the toxin once in the prey.   Source: Jellyfish Page
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