River
Nan
8 profiles across 6 families name the Nan as a locality.
- Species
- 8
- Families
- 6
- Photographed
- 8 of 8
- Difficulty rated
- 8 of 8
Basin
Also in the Chao Phraya basinspecies recorded from both
Shares fishes with rivers elsewherespecies recorded from both
Runs through

Acrochordonichthys gyrinusFalcate Chameleon Catfish
Akysidae · Vidthayanon & Ng, 2003
As in other members of the genus body colouration in this species is variable, even among individuals collected from a single locality, although a few regularities have been observed which can be used to distinguish certain species from one another. This is thought related to the fact that Acrochordonichthys spp. periodically shed their skins and appear paler post-moulting.

Ambastaia nigrolineataBlack-Lined Loach
Botiidae · Kottelat & Chu, 1987
This specie is relatively rare in the aquarium trade and much sought after by enthusiasts as a result. It looks relatively similar to A. sidthimunki but according to the original description by Kottelat and Chu (1987) can be told apart by colour patterning which uniquely consists of a solid da...

Hemimyzon nanensis
Balitoridae · Doi & Kottelat, 1998
Most importantly the water must be clean and well-oxygenated so we suggest the use of an over-sized filter as a minimum requirement. Turnover should ideally be 10-15 times per hour so additional powerheads, airstones, etc. should also be employed as necessary. Base substr...

Hypsibarbus vernayi
Cyprinidae · Norman, 1925
It is very similar to H. wetmorei but can be told apart by possessing yellow (vs. orange to red in H. wetmorei) pectoral, pelvic, and anal fins. It thus appears likely that yellow-finned fish marketed as H. wetmorei or 'lemon fin barb' in the ornamental trade are actually H. vernayi, with both species available on a regular basis.

Mystacoleucus greenwayi
Cyprinidae · Pellegrin & Fang, 1940
Predominantly a riverine fish favouring clear, well-oxygenated, running water with substrates of sand or gravel and often present in rock and boulder-filled headwater streams. In the Mun River, close to the Pak Mun dam, Thailand, sympatric species included Hampala dispar, Cyclocheilichthys apogon, Osteochilus hasseltii,...

Datnioides pulcherSiamese Tiger Perch
Datnioididae · Kottelat, 1998
The massive decline in wild populations, hypothesised to be in excess of 90% since the mid-1980s, is thought to have been caused by a variety of factors, including habitat alteration due to construction of dams and other infrastructure, removal of riparian vegetation, and urban pollution, plus over fishing for both human consumption and the aquarium trade.

Channa maculataBlotched Snakehead
Channidae · Lacepède, 1801
This species is frequently confused with C. argus but can be distinguished by the following characters: dorsal-fin rays 38-45 (vs. 47-50 in C. argus); anal fin rays 26-29 (vs. 31-36); lateral line scales 50-56 (vs. 60-66); 2-3 rounded blotches on caudal peduncle (vs. no blotches on caudal peduncle). It is widely-distributed in Pacific coastal drainages of southeastern China (e.g. the Yangtze, Minjiang, Hangjiang River, and Pearl (Nanjiu...

Garra theunensis
Cyprinidae · Kottelat, 1998
This species can be distinguished from congeners in Southeast Asia and China by the following combination of characters: plain brown body and fins, sometimes with 6-8 narrow, faintly distinct, longitudinal stripes; snout triangular in dorsal view, with small tubercules and without transverse groove...