The goldfish is a freshwater fish in the family Cyprinidae of order Cypriniformes. It is commonly kept as a pet in indoor aquariums, and is one of the most popular aquarium fish. Goldfish released into the wild have become an invasive pest in parts of North America and Australia.
Goldfish
Feral Goldfish found in Essex County, Ontario.
Carassius auratus by Alexander Francis Lydon.
Three goldfish from Fish Swimming Amid Falling Flowers, a Song dynasty painting by Liu Cai (c. 1080–1120)
Cyprinidae is a family of freshwater fish commonly called the carp or minnow family, including the carps, the true minnows, and their relatives the barbs and barbels, among others. Cyprinidae is the largest and most diverse fish family, and the largest vertebrate animal family overall, with about 3,000 species; only 1,270 of these remain extant, divided into about 200 valid genera. Cyprinids range from about 12 mm (0.5 in) in size to the 3 m (9.8 ft) giant barb. By genus and species count, the family makes up more than two-thirds of the ostariophysian order Cypriniformes. The family name is derived from the Greek word kyprînos.
Cyprinidae
Giant barbs (Catlocarpio siamensis) are the largest members of this family.
Rainbow shark, Epalzeorhynchos frenatum, a somewhat aggressive aquarium fish
Acheilognathus longipinnis: Acheilognathinae
