Summary
Tropical freshwater fishes are popular aquarium pets throughout the United States and often become invasive when aquarists release unwanted pets into lakes, streams, and wetlands where they consequently impact native species and the freshwater resources upon which humanity depends. Most of these tropical fishes are intolerant of cold winters and subsequently establish invasive populations only within subtropical regions like Florida and southern portions of California, Arizona, and Texas. However, environmental change and the growth of cities that absorb solar heat are causing freshwater envir
