Goldfish
The goldfish ("Carassius auratus") is a freshwater fish in the family Cyprinidae of order Cypriniformes. It is one of the most commonly kept aquarium fish.
Southern platyfish
The southern platyfish, common platy, or moonfish ("Xiphophorus maculatus") is a species of freshwater fish in family Poeciliidae of order Cyprinodontiformes. A live-bearer, it is closely related to the green swordtail ("X. hellerii") and can interbreed with it. It is native to an area of North and Central America stretching from Veracruz, Mexico, to northern Belize.