Yes, you can use aluminum foil to wrap fish. It's a common practice for baking or grilling fish as it helps retain moisture and flavor. The foil prevents the fish from drying out and allows for even cooking. However, ensure the foil is food-grade and avoid using dull or damaged foil as it may tear or release particles into the food. It's also important to fold the foil properly to seal in the juices and prevent any leakage.