NERVES

The nervous system of a fish consists of two parts: the cerebrospinal system (as the fish is a vertebrate!) and the autonomic system. The cerebrospinal system is divided into two divisions: the central division, consisting of the brain and spinal cord, and the peripheral division, consisting of both the cranial and spinal nerves and the specialized sensing organs, such as the eyes and ears. The autonomic nervous system consists of ganglia, fibers, and of both the sympathetic and parasympathetic parts.

Olfactory Nerve: nasal mucosa and brain
Optic Nerve: eye for visions and ocular reflexes
Oculomotor Nerve: intrinsic and extrinsic ocular muscles
Trochlear Nerve: superior oblique muscles of the eye
Trigeminla Nerve: sensation to face and motor fibers to muscles
Abducent Nerve: lateral rectus muscles of eyeball
Facial Nerve: superficial muscles of the face and taste fibers
Auditory Nerve: vestibluar sensory in ear
Glossopharyngeal Nerve: tongue, mouth, and body
Vagus: esophagus, stomach, larynx, trachea, and lungs

Spinal nerves carry sensory and motor fibers to and from the spine to the rest of the body and vise-versa. These paired nerves ate attached segmentally to the cord behind the brain. Along the spinal cord lie the relay centers ganglia, belonging to the autonomatic nervous system) to which all collected information is relayed.