Harvested a snakehead. The fish swallowed my chatterbait. Placed the snakehead on a stringer attached to my kayak for a couple of hours after the catch. When I lifted him out of the water at the end of my session, he appeared to be dead. There was absolutely no evidence of life functions. I placed the fish in a plastic bag, loaded my gear and drove home. The fish was in the plastic bag for approximately 35 minutes.
When I arrived home, I put him in the refrigerator while I prepared an area to clean the fish. After ten minutes, I placed him in the sink and began to eviscerate him. I felt that the beginning of rigor mortis had begun. My daughter was present in the kitchen and had never witnessed a fish getting prepared for eating. As i opened the abdominal cavity I started pointing out some of the internal organs.
I had removed most of the contents of the abdominal cavity, when my daughter said she thought she saw the heart beating. I said, "No way, it must be vibrations from me moving him around." I was wrong… the heart was beating… then suddenly, I saw the gills move reflexively. My daughter's iPhone is always on her person, so I asked her to video the phenomena.
I want to be clear that this video was taken solely to document this phenomena. I firmly believed the fish was dead, before I started the cleaning process. I must have stimulated his nervous system during the evisceration. Definitely one tough and tasty fish.