Carassius is a genus in the ray-finned fish family Cyprinidae. Most species in this genus are commonly known as crucian carps, though this term often specifically refers to C. carassius. The most well known is the goldfish. They have a Eurasian distribution, apparently originating further to the west than the typical carps (Cyprinus), which include the common carp.
Tanakia is a genus of cyprinid fish, consisting of five species that occurs in Eastern Asia. The type species is the Tanakia limbata.
The Ayumodoki or Kissing Loach is a species of ray-finned fish in the family Botiidae. It is found in lakes and streams on Honshu, the largest island of Japan. Spawning grounds for kissing loach are ditches and small reservoirs for rice cultivation of a river system located in Japan. The kissing loach migrates to flooded areas, including paddy field areas, for spawning in early summer and the spawning of this species is limited after the formation of flooded areas over terrestrial vegetation.
Clidoderma is a genus of righteye flounders containing one extant species and two described fossil species from Japan.
Pseudorasbora is a genus of small freshwater fish native to eastern Asia, including China, Korea, Japan and Siberia. P. parva, has been introduced to regions outside its native range and is considered invasive.
Zacco is a genus of small ray-finned fishes in the family Cyprinidae. They are found in freshwater habitats in China and northern Vietnam. The generic name Zacco derives from the Japanese Zako 雑魚.
Gnathopogon is a genus of cyprinid fish found in eastern Asia. There are currently nine species in this genus.
Opsariichthys is a genus of cyprinid fish found in freshwater habitats in China, Taiwan, Japan, Korea, and Vietnam. There are currently 12 described species in the genus.
Pseudogobio is a genus of cyprinid fish found in eastern Asia. There are currently four described species in this genus.
Sarcocheilichthys is a genus of cyprinid fishes found in eastern Asia. There are currently 12 species in the genus.
Squalidus is a genus of cyprinid fish that occurs in eastern Asia. There are currently 14 described species in this genus.
Stephanolepis cirrhifer, commonly known as the thread-sail filefish, is a species of marine fish in the family Monacanthidae. It is found in the western Pacific, in an area that ranges from northern Japan to the East China Sea, to Korea. Other common names for the fish include "Kawahagi" "カワハギ" "皮剥" (Japanese) and "Jwi-chi" (Korean). The fish grows to a maximum length of about 12 inches, and consumes both plant material and small marine organisms like skeleton shrimp. S. cirrhifer is host of the parasite Peniculus minuticaudae. Some minor genetic differentiation between S. cirrhifer born in the wild and those bred in a hatchery for consumer use has been shown. The fish is edible and sold commercially for culinary purposes in many Asian countries.
The Japanese jack mackerel, also known as the Japanese horse mackerel or Japanese scad, is a species named after its resemblance to mackerel but which is in the family Carangidae, the jacks, pompanos, trevallies and scads. Their maximum reported length is 50 cm (20 in) with a common length of 35 cm (14 in). They have a maximum reported weight of 0.66 kg (1.5 lb) and a maximum reported age of 12 years. They are found around the coast of Japan, apart from Okinawa Island, usually on sandy bottoms of 50–275 m (164–902 ft) deep. They feed mainly on small crustaceans such as copepods, and shrimps and small fish. They are similar to the yellowtail horse mackerel around New Zealand and Australia, apart from having more gill rakers and larger eyes.
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.
Nipponocypris koreanus is a species of cyprinid in the genus Nipponocypris, a Cyprinid fish. It inhabits South Korea and has a maximum length of 22.1 centimetres (8.7 in) and a maximum published weight of 51.02 grams (1.800 oz).
Nipponocypris sieboldii is a species of cyprinid in the genus Nipponocypris that is endemic to Japan. It has a maximum length of 12.5 centimetres (4.9 in).
Nipponocypris temminckii is a species of cyprinid in the genus Nipponocypris. It inhabits China, Japan and Korea and has a maximum length of 15.0 centimetres (5.9 in).
Opsariichthys uncirostris is a species of cyprinid in the genus Opsariichthys. It inhabits Siberia, China, Korea and Japan. It has a maximum length of 32.5 centimetres (12.8 in); males have a common length of 12.4 centimetres (4.9 in).
Coreoperca kawamebari, commonly known as the Japanese perch, redfin perch, Japanese river perch, Eye-spot perch or in Anglophone parts of Japan, simply the perch, is a predatory species of the freshwater perch native to Japan and southern Korea. They are sometimes kept as pets. The Japanese perch are a member of the perch family but with the predatory feeding behaviour of the black bass (Micropterus) and bluegill.
