In general, the desert is not a suitable environment for fish. Due to the special climate, extremely low water source and high temperature environment in desert areas, water resources are very limited, and fish need water to survive. However, some fish have the ability to adapt to extreme environments, especially some special fish that are able to survive in a small amount of water in the desert.
For example, in the Sonoran Desert in Arizona, there is a species of fish called "Sonora perch." They have adapted to desert environments and can survive in arid rivers, puddles, or springs. These desert fish can reduce the rate of their body's metabolism by adapting to dry environments, tolerate low-oxygen water bodies, and are able to store excess water.
In addition, some freshwater fish such as desert frog and manchu fish can survive in lakes, ponds or underground water sources with high water levels. Although they cannot survive in completely arid desert areas, they can find suitable habitats in some special environments.
It is important to note that the species of these fish that survive in the desert are very limited and scarce. Most fish still depend on humid environments such as lakes, rivers and oceans, and deserts are not ideal places for them to survive. It's really the size of the world, subverting cognition.