Koi, or more specifically nishikigoi, are colored varieties of carp that are kept for decorative purposes in outdoor koi ponds or water gardens.
The term carp is a generic common name for numerous species of freshwater fish from the family Cyprinidae, a very large clade of ray-finned fish mostly native to Eurasia. While carp are prized quarries and are valued as both food and ornamental fish in many parts of the Old World, they are considered trash fish and invasive pests in many parts of Africa, Australia and most of the United States.
The Eurasian carp or European carp, widely known as the common carp, is a widespread freshwater fish of eutrophic waters in lakes and large rivers in Europe and Asia. The native wild populations are considered vulnerable to extinction by the International Union for Conservation of Nature (IUCN), but the species has also been domesticated and introduced into environments worldwide, and is often considered a destructive invasive species, being included in the list of the world's 100 worst invasive species. It gives its name to the carp family, Cyprinidae.
Cyprinus is the genus of typical carps in family Cyprinidae. Most species in the genus are of East Asia origin with only the common carp in Western Asia and Europe; this invasive species has also been introduced to many other regions around the world. Cyprinus are closely related to some more barb-like genera, such as Cyclocheilichthys and Barbonymus (tinfoils). The crucian carps (Carassius) of western Eurasia, which include the goldfish, are apparently not as closely related.
Carassius is a genus in the ray-finned fish family Cyprinidae. Most species in this genus are commonly known as crucian carps, though that term often refers specifically to C. carassius. The most well known species is the goldfish. They have a Eurasian distribution, apparently originating further to the west than the typical carps.
Leptauchenia is an extinct goat-like genus of terrestrial herbivore belonging to the oreodont family Merycoidodontidae, and the type genus of the tribe Leptaucheniini. The genus was endemic to North America during the Late Oligocene to Early Miocene and lived for approximately 17.6 million years.
Protapirus is an extinct genus of tapir known from the Oligocene and Miocene of North America and Eurasia.
Dapaloides is an extinct genus of prehistoric estuarine ray-finned fish that lived during the early Oligocene to the early Miocene epoch. Many of the remains now assigned to this genus were previously assigned to Dapalis. It was previously classified as a "percichthyid" under a former treatment of the family, but is now treated as an indeterminate perciform.
The Japanese white crucian carp, also known as Japanese carp, white crucian carp, or gengoro-buna, is a species of freshwater fish in the carp family. It is found in Japan and, as an introduced species, in several other countries in Asia. This fish is closely related to the commonly known goldfish.
Eoplectreurys is an extinct monotypic genus of spider from the family Plectreuridae, with a sole species, Eoplectreurys gertschi. The fossils of Eoplectreurys were recovered from the ~164 Ma old Middle Jurassic Daohugou formation tuffs in Inner Mongolia, China.
Veratalpa lugdunensiana is a fossil mammal from the Miocene of France. Known from a single astragalus, the species was assigned to its own genus, Veratalpa, by Florentino Ameghino in 1905. He placed it in Talpidae, the family of the moles, but in 1974, John Howard Hutchison argued that the astragalus was not talpid and more likely came from a rodent. The astragalus is about 4.5 mm long, broad for a talpid, and has the head oriented farther from the axis of the foot than in talpids.
The crucian carp is a medium-sized member of the common carp family Cyprinidae. It occurs widely in northern European regions. Its name derives from the Low German karusse or karutze, possibly from Medieval Latin coracinus.
Casaleia is an extinct genus of ants in the formicid subfamily Amblyoponinae described by Pagliano & Scaramozzino in 1990 from fossils found in Europe. The genus contains four species dating from the Eocene to Miocene, Casaleia eocenica, Casaleia inversa, Casaleia longiventris, Casaleia orientalis.
Feroseta is an extinct genus of mantidfly in the neuropteran family Mantispidae known from a fossil found in North America, and which contains a single species, Feroseta prisca.
The ginbuna, sometimes referred to as silver crucian carp or Japanese silver crucian carp, is a species of freshwater fish in the carp family. It is native to lakes and rivers in Japan.
Miocochilius is an extinct genus of small notoungulate mammals (typotheres) native to South America. The genus lived during the Middle Miocene epoch. The genus contains two described species, the type species M. anomopodus described in 1953 by Ruben Arthur Stirton and M. federicoi, described and included in the genus by Darin A. Croft.
Canaanimico is an extinct genus of medium-sized New World monkeys from the Late Oligocene fossiliferous fluvio-lacustrine Chambira Formation of the Ucayali Basin in Amazonian Peru. The genus was described by Marivaux et al. in 2016 and the type species is C. amazonensis.
Paradracaena is an extinct genus of lizards from northern South America. Fossils of Paradracaena colombiana have been found in the Honda Group of Colombia, Peru and Brazil. The species was described as a member of the tegus; Tupinambis huilensis by Estes in 1961.
Prolicaphrium is an extinct genus of proterotheriid litoptern that lived during the Early Miocene, in what is now Argentina. Fossils have been found in the Sarmiento Formation of Argentina.
