There are many species of fish considered 'exotic' to the Navajo Nation. These fish were mostly moved with human influence to provide for sport fishing. These include the Rainbow Trout, Catfish, and Bluegill. Goldfish and Koi are commonly kept as pets either in aquariums or outdoor ponds. These fish are maintained as residents at the Navajo Zoo to provide contrast with those considered 'native' to Navajolands.

Fish are called "Lóó" in the Navajo language. Traditional Navajo People belief that fish are closely related to reptiles and they should not be eaten. It is said that expectant parents should not fish or eat fish.