''Hemigrammocypris rasborella'', the golden venus chub, is a species of

cyprinid Cyprinidae is a family of freshwater fish commonly called the carp or minnow family. It includes the carps, the true minnows, and relatives like the barbs and barbels. Cyprinidae is the largest and most diverse fish family and the largest ver ...

fish

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found else ...

to the islands of

Honshu , historically called , is the largest and most populous island of Japan. It is located south of Hokkaidō across the Tsugaru Strait, north of Shikoku across the Inland Sea, and northeast of Kyūshū across the Kanmon Straits. The island se ...

Shikoku is the smallest of the four main islands of Japan. It is long and between wide. It has a population of 3.8 million (, 3.1%). It is south of Honshu and northeast of Kyushu. Shikoku's ancient names include ''Iyo-no-futana-shima'' (), '' ...

and Kyushu in Japan. It is found widely in lowland habitats, including ditches and ponds.Onikura, Nakajima, Kouno, Sugimoto, and Kaneto (2010). Maturation and Growth in the Wild Population of Hemigrammocypris rasborella. Aquaculture Sci. 58(2): 297-298. It is listed as

endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and in ...

on the Japanese

Red List The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is the world's most comprehensive inventory of the global conservation status of biologi ...

. ''H. rasborella'' is the only species in its genus, but there are significant genetic differences between some populations, comparable to those generally seen between closely related species. It reaches up to in length, but typically is .Podwodne Krolestwo (10 February 2017)
Hemigrammocypris rasborella.
Retrieved 17 March 2017. It is a short-lived species that typically reaches an age of about one year. It is listed as endangered in the Red List of Threatened Fishes of Japan.

References

Cyprinid fish of Asia Freshwater fish of Japan Taxa named by Henry Weed Fowler Fish described in 1910 {{Cyprinidae-stub