The fish in this video is still fighting even after its head and guts were removed. Is this a sign of the coming zombie fish apocalypse?
No, there’s no need to worry about zombie fish creeping out of your backyard pond. The reason this fish is able react as though it were alive is because the nerves that control movement are in the spinal column, muscles, and skin—not the actual head.
While not uncommon, this is a particularity extreme example of a fish exhibiting “living” behavior even without a head.