If PCBs or similar chemicals are present, they will be concentrated in these fatty portions of the fish. Avoid using batter or breading when cooking the fish, because they hold fat drippings, which may contain the chemicals of concern. Eat smaller fish, as long as they are within the legal size limit. Larger fish have lived longer than smaller fish and will therefore contain more chemicals. Vary the kinds of fish you eat.
Contaminants tend to build up in predators and bottom feeding fish.
If possible, freeze part of your catch and space out these meals over time, to reduce the amount of chemicals consumed in one sitting.