If you plan to store wet fish then be aware that a fan assisted cabinet can dry out the product. Salt (and in some cases ammonia) can react with the copper and aluminium used in conventional refrigeration systems causing corrosion. A good wet fish cabinet should (ideally) be stainless steel, have a static internal refrigeration system, corrosion proof drawers with internal scale plates and also a drain at the bottom of the cabinet. The temperature should be approximately 0C and, if possible, flaked ice should cover the fish.