The best way to store fish is over ice. Remove the fish from its original packaging, rinse under cold water, and dry with paper towels. Set fish on a cooling rack and place inside a container filled with crushed ice. The ice should reach just beneath the fish, but shouldn’t touch it. Cover the container, rack, and fish with plastic wrap or aluminum foil and place in the fridge. If the fish is stored longer than 24 hours, be sure to swap out the melted ice with a new batch. Ideally, any fresh fish should not be stored for more than two days.