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Jellyfish do not get a lot of good headlines. They knock out power plantsPower stations, where electricity is generated for people to use. , shut beaches, sink boats and wipe out fish farms.

They have no brains. But now scientists have found the Caribbean box jellyfish is smarter than it looks. It can learn to spot and avoidKeep away from something. things that get in its way.

"This is big news," says scientist Anders Garm. The research helps us understand how memories are made and lost.

Sea jellies have existed for over 500 million years. There are thousands of different speciesA set of animals or plants with similar features. Members of the same species can breed with each other. - some so tiny that you cannot see them, some much larger than people.

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And some can do amazing things. They can make copies of themselves to create huge jelly blooms. And one species called the immortalLives forever. jellyfish can, in theory, live forever.

Some have deadly weapons. The Australian box jellyfish is the most venomousPoisonous. animal in the sea.

But jellyfish can also repair themselves without scarring. Researchers believe tentacle extract may be useful in medicine.

Are they clever? They can learn, remember, and use their 24 eyes and hair-trigger sting cells to hunt their preyAnimals hunted and eaten by others. - very good for an animal that is 95% water.

Yes! Jellyfish can learn without a mind. They have stayed alive for millions of years by keeping things simple. We should see if we can learn any lessons from them.

No! Jellyfish are not much more clever than other animals. But in the past, we have been too quick to say that humans are the only animals that can do amazing things.