A video has been spread this workweek of a fish that " ca n’t be killed " . On first glimpse , it looks like a fish that ’s had its headway removed and been curve in one-half , but is nevertheless still flap around .

For those of you too faint of heart to watch it , the fish thrashes around pretty violently , so much so that it closely comes out of the container it ’s in .

It ’s pretty distressing , and not demeanor you ’d look from a fillet .

People online have manifestly been pretty distressed by the video .

What ’s more , it ’s not just this fish . It can be replicated with others .

There are specially strange videos that circulate a few days ago of " dancing " dead squid .

So what ’s materialize ?

Well , the fish are not active , gratefully , so you may arrest call PETA . There is no psyche activity in any of the Pisces , nor any other signs of life . No pain is felt by the fish , because the fish are not live to find it .

The movement comes from a chemic reaction that stimulates the Pisces ’s muscle tissues .

For some time after demise , brawn motor neurons within these tissue paper still   have some tissue layer potential . The Pisces ’s brain are very much idle , but most of their tissue is very much alive in these viral videos .

The muscleman in the fish containadenosine triphosphate , the principal source of energy for muscleman contractions .

" Most of the tissue … is actually still live , "   a interpersonal chemistry professor at the University of Virginia explicate toDiscovery News . " Cell metabolite are well-nigh intact , membrane voltages or potentials that be in face cells are probably still close to intact . "

" Even though the brain mathematical function is escape , the tissue will still answer to stimuli . "

In this case , add together saltiness to the Pisces the Fishes ( in the phase of board salt or soy sauce ) can trigger muscularity spasms in very recently deceased fish and   cephalopod . The salt gets engage and vary the voltages across boldness cell membranes , trigger the ( somewhat violent ) contraction of the muscle you see .

In inadequate , the fish are dead , their muscle just do n’t know it yet .