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Which animal doesn't have a brain?

Published in Animal Brain Absence 1 min read

The animal that does not have a brain is the jellyfish.

Jellyfish are fascinating aquatic creatures that lack a centralized brain, heart, and lungs.

Jellyfish Nervous System

Instead of a brain, jellyfish possess a network of nerve cells spread throughout their body. This mesh of nerves allows them to sense their surroundings, particularly through their tentacles.

  • No Brain: Jellyfish do not have a brain as we know it in other animals.
  • Nerve Net: They have a simple nervous system comprised of a nerve net.
  • Touch Sensitivity: This nerve net makes them very sensitive to touch.

Although jellyfish don't have a brain, they can still perceive and react to their environment through this dispersed nerve network.

Here's a summary table:

Animal Brain Nervous System
Jellyfish No Nerve Net