Sneha Singh
Starfish have no brain or central nervous system. They navigate and hunt using a network of nerves spread throughout their arms.
These vibrant marine animals function as colonies, relying on their polyps' nerve nets for basic responses.
With a simple nerve net, sea anemones catch prey and react to their environment without a brain.
These deep-sea creatures use their feathery arms to filter food, all without a central nervous system.
Existing since prehistoric times, sponges filter nutrients from water and regenerate without a brain.
Tiny freshwater animals, hydras use a nerve net to capture prey and move, thriving without a brain.