Fish Cleaning Recommendations
Mercury and PFOS cannot be removed through cooking or cleaning -- they get into the flesh of the fish. Reduce your intake of contaminants like mercury and PFOS by eating smaller fish. Eat more panfish (sunfish, crappies) and fewer predator fish (walleyes, northern pike, lake trout).
You can reduce the amount of other contaminants like PCBs by removing fat when you clean and cook fish. Trim skin and fat, especially belly fat. Also, eat fewer fatty fish such as carp, catfish, and lake trout. PCBs build up in fish fat.