Learn 7 Wobbly Facts About Jellyfish


Jellyfish are one of the oldest forms of life on Earth, with fossils dating back more than 500 million years.

Ancient creatures


Despite their name, jellyfish are not actually fish. They belong to a group of invertebrates called cnidarians, which also includes corals and sea anemones.

Not really fish


Jellyfish have soft, gelatinous bodies composed mainly of water. Their bodies are transparent or translucent, allowing light to pass through.

Gelatinous bodies


Jellyfish lack brains, hearts, and other complex organs. Instead, they have a simple nervous system called a nerve net, which helps them respond to their environment.

No brains or hearts


Jellyfish have lengthy, venomous tentacles. These tentacles hunt and defend. Some jellyfish are harmless.

Venomous tentacles


Jellyfish have a complex lifecycle with medusa (adult) and polyp (attached) stages. They reproduce sexually and asexually.



Jellyfish can be found in every ocean, from surface waters to the deep sea. They are highly adaptable and can thrive in a wide range of marine environments.

Global distribution

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