Robot Fish are a fish in Disney Dreamlight Valley's A Rift in Time expansion, and they play an important role in the Flying Metal Nuisance Story Quest. More specifically, Robot Fish is used in a dish that must be prepared as part of that Story Quest, and fans cannot continue exploring Eternity Isle until they cook it. Fortunately, it is not extremely difficult to get a Rainbow Fish in Disney Dreamlight Valley, though these aquatic creatures can prove to be a bit elusive.