Before refrigerating the fish, wash it in cold water and dry it off with a clean cloth or paper towels. Wrap cleaned fish in wax paper, plastic wrap, or aluminum foil and store them on ice or in the refrigerator. Large fish can last longer, or large portions are kept longer. Lean fish (panfish and walleye) stores better than fatty fish (trout), lean fish (pancakes) can last two days store fish in the fridge.