There is a (VIDEO) on Facebook where the fish starts to flail around despite no heart or internal organs.
What causes the fish to flail around the way it does?
- It is because of pressure causing the muscles to contract - much like when you leave your own hand loose and squeeze up your arm making your fingers curl.
- It is because the nerves are still alive - much like how you can rub the fish heart the right way and cause it to beat again even though the fish is very much dead. (I watched my fifth-grade teacher do this in class)