9 animals that don't have a brain

Jellyfish: These mesmerizing creatures have a simple nervous system but lack a centralized brain.

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Starfish: Despite their complex appearance, starfish don't possess a brain.

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Coral: These marine invertebrates exist as colonies and don't have individual brains.

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Sea Anemones: These stationary animals have a primitive nervous system but no brain.

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Sea Cucumbers: These odd-looking creatures have a very simple nervous system, but no brain.

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Sea Squirts: These marine filter feeders have a nervous system as larvae but lose it upon adulthood.

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Sea Sponges: These simple animals lack a nervous system entirely.

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Clams: These bivalves have a simple nervous system but no centralized brain.

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Oysters: Similar to clams, oysters possess a simple nervous system but lack a brain.

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