Poropuntius is a genus of cyprinid fish found mainly in freshwater habitats of Southeast Asia and Yunnan in China, but P. burtoni is from South Asia. Several species have highly restricted ranges and are threatened, and a single P. speleops is a cavefish.
Poropuntius angustus is a species of cyprinid fish. It is endemic to the Mekong Basin and is currently only known from a few tributaries of Mekong in Laos. It grows to 12 cm (4.7 in) SL. It lives mainly in small forest streams.
Poropuntius bolovenensis is a species of ray-finned fish in the genus Poropuntius. This species is endemic to the eastern half of the Boloven Plateau in southern Laos where its numbers are decreasing under heavy fishing pressure. However, the biggest threat to this species is the construction of dams which are likely to have a significant impact on this species. In addition the quality and area of its habitat is declining due to conversion for agriculture. The IUCN assess P. bolovensis as Endangered. This species occurs in clear, rocky streams at altitudes of 800–1,200 m above sea level where it feeds mainly on insects. It does not thrive in reservoirs. It is not a true migrant but it does make local movements. It is targeted by subsistence fisheries.
Poropuntius carinatus is a species of ray-finned fish in the genus Poropuntius from the upper Mekong drainage in Yunnan, Laos, Thailand and probably Myanmar.
Poropuntius consternans is a species of ray-finned fish in the genus Poropuntius which is endemic to the eastern half of the Bolovens Plateau in southern Laos. Its numbers are thought to be decreasing due to heavy fishing pressure, but the biggest threat to this species are the planned dams, Xe, Pian-Xe and Namnoy, which are to be built within the next few years and which are likely to have a significant impact on this species. In addition, there is continuing decline in the quality as the surrounding land is converted to agriculture. The IUCN assess Poropuntius consternans as Endangered.
Poropuntius huangchuchieni is a species of ray-finned fish in the genus Poropuntius which is found in the upper Mekong River basin and the Red River basin in the Yunnan. It may also occur in these rivers in Laos and northern Vietnam.
Poropuntius krempfi is a species of ray-finned fish in the genus Poropuntius from the Red River drainage in Vietnam and Yunnan, and from the Ma River drainage in Vietnam and Laos.
Poropuntius laoensis is a species of ray-finned fish in the genus Poropuntius from the Mekong in Myanmar, Thailand, Laos and Vietnam. It is found in clear forested streams and is not found in large rivers. Id does not persist in impoundments and is not known to migrate. It feeds mainly on insect larvae.
Poropuntius lobocheiloides is a species of ray-finned fish in the genus Poropuntius which is endemic to tributaries of the Xe Kong River on the eastern half of the Bolovens Plateau in southern Laos. Its numbers are thought to be decreasing due to heavy fishing pressure, but the biggest threat to this species are the planned dams, Xe Pian and Xe Namoy, which are to be built within the next few years and which are likely to have a significant impact on this species. In addition, there is continuing decline in the quality as the surrounding land is converted to agriculture. The IUCN assess Poropuntius lobocheiloides as Endangered.
Poropuntius normani is a species of ray-finned fish in the genus Poropuntius which occurs in hill streams and near waterfalls in the upland reaches of river drainages in eastern Thailand, Western Cambodia, the Kong River in Laos and in north central Vietnam. It is common and although threatened by habitat destruction through deforestation it is assessed as Least Concern by the IUCN. It is sometimes eaten but is not a specific target of fisheries and is sometimes turns up in the aquarium trade.
Schistura athos is a species of ray-finned fish in the stone loach genus Schistura, its specific name athos is from, Athos, one of the Three Musketeers by Alexandre Dumas, as do that of two other Schistura species endemic to the Nam Ou basin, S. aramis and S.porthos. It has only been recorded from the Nam Ou basin in Laos, as well as from a stretch of the Nam Noua, a tributary of the Nam Ou, in Vietnam. S. athos has been collected from rapids and stretches of the main river with stone substrates.
Schistura bairdi is a species of ray-finned fish in the genus Schistura.
Schistura khamtanhi is a species of ray-finned fish in the genus most speciose genus in the stone loach family, Schistura. It is found in the Kong River basin in Laos and in the main Mekong river in Cambodia and Laos where it is abundant, being an important quarry species for the fish traps at Kohne Falls. It inhabits rapids and Sony bottomed stretches of the main Mekong and its tributaries and it migrates past the Kohne Falls in January and February annually. It is the only member of the genus Schistura which is known to be migratory. The specific name honours Khamtanh Vatthanatham, a Fisheries Programme Officer of the Mekong River Commission who was very helpful to the Maurice Kottelat during his 1999 survey, in which this species was discovered.
Schistura kloetzliae is a species of ray-finned fish, it is a stone loach in the most speciose genus in that family, Schistura. It has been recorded from the Mengla drainage in Yunnan and its tributary Nam Youan in Luang Namtha province in Laos. It occurs in medium fast currents in streams with gravel or stony bottoms. The specific name honours Antoinette Kottelat-Kloetzli, for her help and support of Maurice Kottelat during his work in Laos, among other things.
Schistura leukensis is a species of ray-finned fish, a stone loach in the genus Schistura. It has only been recorded from a single river, a tributary of the Mekong in Laos. This river has been affected by damming upstream of this species' main habitat and it is unknown how this has impacted the population. Other human activities such as deforestation, agriculture, siltation and pollution may have also had effects on this species.
Schistura quasimodo is a species of stone loach in the genus Schistura. It is known from a single stream from the Nam Ngum drainage in Laos, a tributary of the Mekong. It has a cylindrical body, sometimes with a conspicuous hump. The known material suggests a maximum standard length of about 48 mm (1.9 in).
Hemimyzon confluens is a species of ray-finned fish in the genus Hemimyzon. It is known from a single location in the Nam Ngum drainage in Laos, a tributary of the Mekong. The known material suggests a maximum standard length of about 47 mm (1.9 in). H. confluens is threatened by pollution from mining activities and hydro-power development.
Hemimyzon ecdyonuroides is a species of hillstream loach in the genus Hemimyzon. It is known from two tributaries of the Mekong, from Sekong River and Sesan River drainages in Vietnam and Laos.
Hemimyzon khonensis is a species of hillstream loach in the genus Hemimyzon. It is known from a single specimen collected in the Mekong at the Khone Falls in Laos, near the Cambodian border; it is named for the falls. The specimen was 51 mm (2.0 in) in standard length.
Homaloptera confuzona is a species of hillstream loach in the genus Homaloptera found in Laos, Cambodia and Thailand. It lives in the lower Mekong drainage and coastal streams of Cambodia and eastern Thailand. The maximum size is about 40 cm (16 in) SL.
