Fish have a very basic nervous system which consists of a brain and a spinal cord. This nervous system is responsible for the fish’s movement and response to stimuli. The brain is relatively small and simple in structure, but it is nonetheless essential for the survival of the fish.

fish brain
Here is an image showcasing the brain of the fish and brain structure of the fish.

Fish rely on their sense of smell to find food and avoid predators. They also use their sense of smell to communicate with other fish. Studies have shown that fish can recognize individual smells and use this information to make decisions about whether to approach or avoid certain other fish.

The size and structure of a fish’s brain varies depending on the species of fish. However, all fish have a similar basic structure. The forebrain is responsible for processing information from the senses. The midbrain controls movement. The hindbrain coordinates balance and equilibrium.

Despite their small and simple brains, fish are capable of complex behaviours such as learning, memory, and navigation. Fish are also able to feel pain, and they have been shown to exhibit signs of stress when exposed to stressful situations.

While fish may not be as intelligent as some other animals, they nonetheless play an important role in the ecosystem and provide humans with a valuable source of food.