Jellyfish illustration

Jelly and the Glowing Sea

Jelly the jellyfish drifts into the deep, dark sea and discovers creatures that make their own light.

Ages 5–7⏱ 2 min readOcean science
📝 Worksheet

Jelly the jellyfish didn't swim like a fish. She drifted. She pulsed her soft umbrella body — squish, squish — and let the ocean carry her.

One day, a strong current pulled her down, down, down into the deep sea. The water grew colder. The light faded. Soon, it was darker than the darkest night.

"Hello?" Jelly called. "Is anyone down here?"

Jellyfish under the Sea
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Blink. A tiny blue light flickered. Blink, blink. Then a green one. Then a whole swirl of sparkles!

"Welcome to the deep!" said a little fish with a glowing light dangling in front of its face. "I'm Lumi. Down here, lots of us make our own light."

"Your own light?" said Jelly. "How?"

Octopus under the Sea
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"Our bodies make it, like fireflies," said Lumi. "It's called bioluminescence. We use it to find food, find friends and say hello."

A shrimp flashed a blue hello. A squid rippled with purple lights. The deep sea looked like a party full of floating stars.

Jellyfish with a Star Frame
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Then Jelly noticed something amazing. She was glowing too! Soft pink light shimmered along her tentacles.

"You're one of us!" laughed Lumi.

When the current finally carried Jelly back up to the sunny water, she told all her friends about the glowing sea. "It's dark down there," she said, "but it's never lonely."

⭐ The End ⭐

💬 Talk about it

  1. How does a jellyfish move?
    Show answerIt pulses its body and drifts with the ocean.
  2. What is it called when animals make their own light?
    Show answerBioluminescence.
  3. Why do deep-sea animals glow?
    Show answerTo find food, find friends and say hello.

📖 New words

currentwater moving in one direction, like a river in the sea
bioluminescencelight made by a living thing
🌟 Big idea: Even in the darkest places, you can find light and friends.
🔬 Real-life fact: Most animals that live in the deep ocean can make their own light.

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