Red tail sharks are a species of freshwater fish that are native to South East Asia. They prefer temperatures between 75-80 degrees Fahrenheit, meaning they require a relatively warm environment to thrive. These tropical fish need plenty of open swimming space and good water quality in order to stay healthy and comfortable. Red tail sharks also enjoy areas with strong currents as this helps keep their gills oxygenated and encourages them to be active. To maintain optimal health, it is best to keep the temperature between 78-82 F and ensure that there are no sudden changes in temperature or pH levels within the tank. If the conditions become too cold for these fish, they will become lethargic and ultimately die due to stress-related issues such as infection or disease.