Petco does not buy fish from individuals or local breeders. They work with large, corporate-approved wholesale vendors and cannot legally or logistically pay you for your fish—even if they are high-quality or rare. Can You Trade or Get Store Credit?

Usually considered final sale and cannot be returned. "Think Adoption First": The Surrender Policy

If you are looking to make a little money or ensure your fish goes to a specific kind of home, Petco may not be your best bet. Consider these options instead: Petco and Petsmart buy fish from you or give store credit?