Jellyfish have no brain or heart

HERE’S THE INTERESTING PART

Imagine floating aimlessly for 500 million years with literally nothing in your head. Jellyfish lack a centralized brain, a beating heart, or even blood. They rely on a decentralized "nerve net" to detect environmental changes, snag prey, and reproduce. They are essentially mindless, drifting plastic bags of venom that somehow outlasted the dinosaurs. Proof that being smart is vastly overrated in evolution.

From the Stacky collection1 min read

Jellyfish have no brain or heart — STACKY / Science

Topics in this factmarine biologyjellyfishevolution

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Keep exploring

Modern taxonomy can be mind-blowing. Biologically speaking, which of these animals is technically a reptile?

Drinking a cold glass of milk without getting a stomach ache isn't the human default. Being able to digest dairy as an adult is actually a:

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A bigger world.
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at a time.