Not All Fish Need Warm Temperatures
Not all tropical fish come from the tropics; such as Koi, Goldfish, and a species called Cichlid. Koi are more of a pond fish than they are aquarium fish, however, you can grow them in a small aquarium until they get too big for the fish tank. Goldfish are like Koi in a sense except they do not grow to such large sizes. These are a favorite for small children as they are fairly easy to take care of. They can be trained to come to the surface whenever you feed them. The Cichlid family can include Barbs, Loaches, Sunfish, some types of tetras, and some types of sharks.