Gotta ask: fake? or post-mortem auto nervous response or defensive mecanism? The wtf-factor is numbing...

I think it's real:

http://www.iflscience.com/plants-and-animals/fish-tries-escape-dinner-table-after-head-removed

LMFAHS

Moving this video to messenger's personal queue. It failed to receive enough votes to get sifted up to the front page within 2 days.

2 more comments have been lost in the ether at this killed duplicate.

How is this not considered snuff?

Salt will do that to fresh fish. Something something sodium something something ions something electrical potential = movement.

there looks to be grains of salt on the chopping board. High concentration of Sodium on the muscle fibres can cause the cells to depolarise chaotically like a muscle cramp. Depolarisation releases calcium ions from the sarcoplasmic reticulum causing the muscle fibres to contract and there is enough energy in the cell(ATP) to release the contraction and allow further contractions as with the video.Eventually it will stop working as the ATP is exhausted .

Yeah. What I said basically.