32 Fish of the Mekong Basin

Acantopsis dialuzona is a loach native to the swift, clear streams and rivers of mainland and archipelagic Southeast Asia, from India to Indonesia through the Chao Phraya and Mekong river basins. It can also be found in flooded fields.

Basa is a species of catfish in the family Pangasiidae. Basa are native to the Mekong and Chao Phraya basins in Mainland Southeast Asia. These fish are important food fish with an international market. They are often labelled in North America and Australia as "basa fish", "swai", or "bocourti". In the UK all species of Pangasius may legally be described as "river cobbler", "cobbler", "basa", "pangasius", "panga", or any of these with the addition of "catfish". In the rest of Europe, these fish are commonly marketed as "pangasius" or "panga". Other related shark catfish may occasionally be incorrectly labeled as basa fish, including P. hypophthalmus and P. pangasius.

The beardless barb is a species of freshwater fish in the family Cyprinidae. It is widespread in Southeast Asia. It grows to 25 cm (9.8 in) total length.

Belodontichthys is a genus of sheatfishes native to Asia.

The blackline rasbora is a fish of the family Cyprinidae found in Asia in the Mekong, Chao Phraya, and Mae Klong basins, and also the northern Malay Peninsula. In the aquarium trade, it is known by a variety of other names, including red-tailed rasbora, bora bora rasbora, and brilliant rasbora.

The Mekong giant catfish, is a large, critically endangered species of catfish in the shark catfish family (Pangasiidae), native to the Mekong basin in Southeast Asia and adjacent China. It is considered Critically Endangered due to accelerating habitat loss.

Crossocheilus reticulatus is a freshwater fish in the family Cyprinidae from Southeast Asia. It grows to 17 cm (6.7 in) standard length.

Dichotomyctere ocellatus, commonly the figure 8 puffer or eyespot puffer, is a pufferfish found in freshwater in Southeast Asia. It is known from the lower reaches of the Mekong (Cambodia), the Peninsular Malaysia as well as Borneo.

Rasbosoma is a genus of cyprinid fish found in the Mekong Basin of Southeast Asia. The genus contains only one species, the dwarf scissortail rasbora or Rasbosoma spilocerca. They are small fish with maximum size 2.6 cm (1.0 in) SL.

Gyrinocheilus aymonieri is a freshwater fish native to large parts of Southeast Asia. It is of interest as a local food source and for the aquarium trade. Its common names include honey sucker, sucking loach, Chinese algae eater, and Siamese algae eater; the FAO-endorsed common name is Siamese algae eater.

The iridescent shark is a species of shark catfish native to the rivers of Southeast Asia. Despite its name, it is not a shark. It is found in the Mekong basin as well as the Chao Phraya River, and is heavily cultivated for food there.

The Chinese mackerel, also known as the Chinese seerfish, is a ray-finned bony fish in the family Scombridae, better known as the mackerel family. More specifically, this fish is a member of the tribe Scomberomorini, the Spanish mackerels. It is a marine species occurring in the Western Pacific Ocean, but it also enters the Mekong River.

The Mekong freshwater stingray, Hemitrygon laosensis, is a species of stingray in the family Dasyatidae, restricted to the Mekong and Chao Phraya Rivers in Laos and Thailand; the occurrence in Chao Phraya is considered an introduction. Measuring up to 62 cm (24 in) across, this ray has an oval pectoral fin disc, a tail with both upper and lower fin folds, and a midline row of spine-like dermal denticles. A characteristic feature of this species is its bright orange underside. The Mekong freshwater stingray preys on invertebrates and is aplacental viviparous. It has been assessed as Endangered by the International Union for Conservation of Nature (IUCN), as it is threatened by overfishing and habitat degradation.

Osteochilus melanopleura is a cyprinid freshwater fish from Southeast Asia. It inhabits rivers, swamps, and marshlands, and is adapted to impounded waters and seasonally flooded habitats. It is found in the Mekong River and Chao Phraya River and elsewhere in most countries in Indochina as well as in Sumatra and Borneo. It is eaten as a foodfish and is often processed into fermented products. It grows to 60 cm (24 in) SL.

Osteochilus microcephalus is a cyprinid freshwater fish from Southeast Asia.

Osteochilus vittatus is a species of cyprinid fish from Southeast Asia. Its common name is bonylip barb, hard-lipped barb, or silver sharkminnow. It grows to 32 cm (13 in) SL.

Osteochilus waandersii is a cyprinid freshwater fish from Southeast Asia. It is found in Indochina as well as in Sumatra and Borneo. Its common name is Waanders's hard-lipped barb.

Pao abei is a species of freshwater pufferfish from the Mekong, Chao Phraya the Mae Klong river basins in Southeast Asia.

Pao baileyi, the hairy pufferfish, is a species of pufferfish usually found in the rocky habitats, including rapids, of the Mekong mainstream and its larger tropical freshwater tributaries.

The paradise threadfin is a species of catadromous ray-finned fish, a threadfin from the family Polynemidae which is found in south and southeast Asia in freshwater rivers where it is a valued food fish.

Parambassis siamensis is a species of freshwater fish in the Asiatic glassfish family Ambassidae. It is native to the mainland Southeast Asia in Thailand, Cambodia, Vietnam, and Laos; records from Singapore and Java (Indonesia) probably are introductions. Its range includes the Mekong, Mae Klong, and Chao Phraya basins. It grows to 7.5 cm (3.0 in) standard length, although typical length is about 4 cm (1.6 in).

Puntigrus partipentazona, the partipentazona barb, is a species of cyprinid fish native to Southeast Asia where it is found in the Mekong, Mae Klong, and Chao Phraya basins of Thailand, the Malay Peninsula, and coastal streams of southeast Thailand and Cambodia where it occurs in streams and impoundments with dense weed growth. It can also be found in the aquarium trade. It is frequently misidentified as the similar Puntigrus tetrazona.

Rasbora trilineata is a species of ray-finned fish in the genus Rasbora. Common names include scissortail rasbora and three-lined rasbora. It comes from Southeast Asia.

Rosefin rasbora is a species of ray-finned fish in the genus Rasbora from the Southeast Asia.

Scaphognathops is a genus of cyprinid fishes found in Southeast Asia. Thai vernacular names are pla pak pian, pla pian (ปลาเปี่ยน) or pla ta dam (ปลาตาดำ). It is restricted to Mekong Basin, and not easy to find.

The Siamese fighting fish, also known as the 'betta', is a freshwater fish in the gourami family native to the Mekong river basin of Thailand, Cambodia, Laos, and Vietnam. While one of 73 species that make up the Betta genus, B. splendens are marketed as "bettas" in the aquarium trade, where they are widely popular for their colour, variety, and relatively low maintenance.

The Siamese mud carp is a species of freshwater cyprinid fish, a variety of Asian carp native to the Mekong and Chao Phraya Rivers in Southeast Asia, especially in Cambodia, Laos and Thailand. It is very common in floodplains during the wet season and migrates upstream in the Mekong starting in Cambodia.

The sidestripe rasbora is a species of ray-finned fish in the genus Rasbora from the continental Southeast Asia.The epitheton paviana does not derive from the similar sounding German word for baboon, but from Auguste Pavie. .

The silver rasbora is a species of ray-finned fish in the genus Rasbora. It occurs in the Mekong, Chao Phraya and Mae Klong basins, Malay Peninsula as well as Borneo, Java and Sumatra.

The smallscale archerfish is a perciform fish of genus Toxotes. As its name suggests, the scales of the smallscale archerfish are smaller than those of other archerfish. They reach a maximum length of 15 centimetres (5.9 in). Smallscale archerfish live in the tropical Indo-Pacific region and are potamodromous, moving between fresh and brackish water through their lifetimes.

Wallago attu is a freshwater catfish of the family Siluridae, native to South and Southeast Asia. It is commonly known as helicopter catfish or wallago catfish. Some regional designations, such as the Manipuri Sareng, the Bengal Boal, the Sylheti Gual or the Malaysian and Indonesian Tapah are also occasionally used in English. W. attu is found in large rivers and lakes in two geographically disconnected regions, with one population living over much of the Indian Subcontinent and the other in parts of Southeast Asia. The species can reach a total length of 1 m.

Wallagonia micropogon is a species of catfish in the genus Wallagonia. This species was recently discovered and is found in the Mekong River drainage area between southern Vietnam and northern Laos as well as Chao Phraya River in Thailand. It is a freshwater fish.