Why do fish move when they are dead?

Fish will move when they are dead, which is just a stress response to stimulation.

The fish did die, but the neural reflex arc possessed by vertebrates has stopped the advanced activities of the brain.

But it takes some time for the body to die, so the neural reflex arc after death shows muscle spasm.

Brief introduction of neural reflex arc

Vertebrates all have reflex arcs. Vertebrate nerves are divided into two types: central nerve and wandering nerve, of which wandering nerve is lower.

Grade 4 nerve, innervated by spinal cord, has conditioned reflex function. Generally, after the death of the higher nerve center, the vagus nerve can still work without serious injury to the spinal cord.

Muscle, viscera, epidermis, etc. Are connected by wandering nerves. The treated fish did die, and the advanced activities of the brain stopped. However, it takes some time for the body to die, so after sprinkling salt, the nerve reflex arc will show muscle spasm.