What types of fish live in the cordillera region?

The term "Cordillera" can be broad and refers to mountain ranges. To give you an accurate answer about the fish species found in a Cordillera region, I need more information.

Please specify which Cordillera you are interested in, for example:

* The Cordillera Central in the Dominican Republic: This region has freshwater rivers and lakes with species like the Dominican Tetra (Astyanax mexicanus dominicensis), Guppy (Poecilia reticulata), and various catfish species.

* The Cordillera de los Andes in South America: This region has a wide variety of fish species, including trout, char, catfish, and cichlids depending on the specific location and elevation.

* The Cordillera Cantábrica in Spain: This region's rivers are home to brown trout, Atlantic salmon, European eel, and barbel.

Once you specify the Cordillera region you are interested in, I can provide you with more specific information about the fish species found there.