The Chao Phraya is the major river in Thailand, with its low alluvial plain forming the centre of the country. It flows through Bangkok and then into the Gulf of Thailand.
The iridescent shark, or iridescent shark catfish 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 fahaka pufferfish, also known as the Nile puffer, globe fish, lineatus puffer, is a tropical freshwater pufferfish found in the upper Nile, Chad, Senegal, Gambia, Geba, Volta and Turkana basins in West, Northeast and East Africa.
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.
The clown featherback, also known as the clown knifefish and spotted knifefish, is a nocturnal species of tropical fish with a long, knife-like body. This knifefish is native to freshwater habitats in Cambodia, China, Hong Kong, Laos, Macau, Thailand, and Vietnam, but it has also been introduced to regions outside its native range. It is one of the world's most invasive species.
Pao suvattii, or Arrowhead puffer, is a species of pufferfish. It is a medium-sized pufferfish, reaching 11.5 cm (4.5 in) SL. It is also known as a Pignose Puffer or a Mekong Puffer. It is locally common in the Lower Mekong basin, and is exclusively a freshwater fish.
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.
Pao barbatus is a species of freshwater pufferfish found in the Mekong River in southeast Asia.
Pao cambodgiensis is a species of freshwater pufferfish native to the Mekong basin. It is also recorded from Dong Nai River. This species grows to a length of 15.3 centimetres (6.0 in) SL.
Pao cochinchinensis is a species of freshwater pufferfish native to the basins of the Mekong and Chao Phraya Rivers. This species grows to a length of 7 centimetres (2.8 in) SL.
The green pufferfish or Ceylon pufferfish is a species of pufferfish found in South and Southeast Asia. Its habitat includes rivers, estuaries, lakes and flood plains. It lives in fresh to slightly brackish water.
Pao leiurus is a species of pufferfish found in Southeast Asia from Thailand to Indonesia and in particular the Mekong basin. It is occasionally imported into the aquarium trade but is reported to be aggressive and snappish.
Pao palembangensis, is a species of freshwater pufferfish native to Thailand, Laos, Malaysia and Indonesia in Southeast Asia. Its commonly called the humpback puffer or dragon puffer. It is bred for aquaria as an ornamental fish because of its beautiful skin colouration and pattern.
Puntius brevis, sometimes known as the swamp barb, is a species of ray-finned fish in the genus Puntius. It is found in the Mekong and Chao Phraya basins. Puntius spilopterus is sometimes considered conspecific.
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.
Pao is a genus of mostly freshwater pufferfish with one species also occurring in brackish water. They are found in Southeast Asia. Until 2013, its species were generally placed in Tetraodon.
Pao turgidus is a species of freshwater pufferfish native to the Mekong basin. It may also occur in the Chao Phraya basin in Thailand. This species grows to a length of 18.5 centimetres (7.3 in) SL.
Crossocheilus reticulatus is a freshwater fish in the family Cyprinidae from Southeast Asia. It grows to 17 cm (6.7 in) standard length.
The giant gourami is a species of large gourami native to freshwater habitats in Southeast Asia. It has also been introduced elsewhere. The species is commercially important as a food fish and is also farmed. It can be found in the aquarium trade, as well. The species has been used for weed control on highly invasive aquatic plants like Salvinia molesta, as the giant gourami can be a voracious herbivore.
Pao ocellaris is a species of pufferfish in the family Tetraodontidae. It is a tropical freshwater species native to Asia, where it is known from Mae Klong in Thailand to the lower Mekong basin in Cambodia, Vietnam, and Laos. It was included in the genus Tetraodon until 2013.
