What animal has no brain?

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Solution

Animal without brain:
All animals have brains, but some organisms do not have any brain.
These animals are primitive or simplest animals.
The primitive organisms are sponges.
They essentially have no brain or nervous tissue.
Sponges survive on the sea floor by taking nutrients into their porous bodies.

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What animal has no brain?

Animal without brain:All animals have brains, but some organisms do not have any brain.These animals are primitive or simplest animals.The primitive organisms are sponges.They essentially have no brain or nervous tissue. Sponges survive on the sea floor by taking nutrients into their porous bodies.