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A jellyfish moves by opening and closing its bell. The jellyfish opens its bell. Water moves in. The jellyfish closes the bell. It pushes the water out behind it. The jellyfish moves forward.

Jellyfish can be big or small. Some jellyfish are smaller than the tip of your finger. The largest known jellyfish is the lion’s mane jellyfish. Its bell can be wider than a human adult. Its tentacles can be longer than a school bus.

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Making Connections


Would you ever want to see a jellyfish in real life? Why or why not?


Have you read other books about ocean animals? How are those ocean animals similar to or different from jellyfish?


Jellyfish can sting with their tentacles. What other animals have body parts that protect them?

Teacher Resources

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