Mamta
Jellyfish float through the ocean with no brain. Instead of a brain, they have a nerve net that helps them respond to their surroundings.
No brain, Sponges live by filtering water for food. They rely on specialized cells to react to the environment, but have no nervous system.
Corals may not have a brain, but they create massive underwater reefs. They use simple nerve networks to sense light and water conditions.
No brain, but still a master of the ocean floor. Sea stars have a nerve ring and radial symmetry that allows them to move and respond to stimuli.
No brain, but they have a simple nerve ring. Sea cucumbers can expel their internal organs as a defense mechanism and regenerate them.
These beautiful sea slugs have no brain but are experts at avoiding predators. Their decentralized nerve system helps them react quickly.
These flat, slippery flatworms have no brain but are surprisingly smart. Their simple nerve cords allow them to learn and adapt.