Do a fish have nervous system?

Yes, fish have a nervous system. The fish nervous system is responsible for coordinating the fish's body movements, processing sensory information, and controlling the fish's internal organs. The fish nervous system is divided into two main parts: the central nervous system and the peripheral nervous system.

The central nervous system of a fish consists of the brain and the spinal cord. The brain is located in the head of the fish and is responsible for processing sensory information, controlling the fish's movements, and regulating the fish's internal organs. The spinal cord is a long, thin bundle of nerves that runs from the brain to the tail of the fish. The spinal cord carries messages between the brain and the rest of the fish's body.

The peripheral nervous system of a fish consists of all the nerves that connect the central nervous system to the rest of the fish's body. The peripheral nervous system is responsible for sending sensory information to the brain and controlling the fish's muscles.

The fish nervous system is a complex system that allows fish to interact with their environment and survive in their habitat.