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Why do jellyfish sting?

Jellyfish sting to catch tiny food and to keep themselves safe.

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Pip’s answer

  1. Jellyfish sting to catch tiny food and to keep themselves safe.
  2. Their long, floaty strings have teeny stingers, too small to see.
  3. With no brain, its strings sting whatever they bump, so look but never touch, buddy!
  4. Wow-ee, jellyfish have floated in the sea since before the dinosaurs!

For grown-ups

Jellyfish tentacles are covered in stinging cells called nematocysts. When something brushes them, tiny harpoon-like threads fire out and inject venom to stun prey. Jellyfish have no brain; the stinging is automatic, which is why even washed-up jellyfish can sting. Look, but do not touch.

Ask your child: What should we do if we see a jellyfish on the beach?

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