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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

We're unsure whether this species has been seen in the aquarium trade.

Acrochordonichthys gyrinusFalcate Chameleon Catfish

Akysidae · Vidthayanon & Ng, 2003

Max length
80mm SL3.1in SL
Tank
75 × 30cm30 × 12in
Temp
17.5–24°C64–75°F
pH
5.0–7.0

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.

Easy
Adult, probably male, specimen.

Ambastaia nigrolineataBlack-Lined Loach

Botiidae · Kottelat & Chu, 1987

Max length
80mm SL3.1in SL
Tank
90 × 30cm36 × 12in
Temp
20–25°C68–77°F
pH
6.5–7.5

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...

Moderate
This species may not yert have appeared in the aquarium hobby.

Hemimyzon nanensis

Balitoridae · Doi & Kottelat, 1998

Max length
57mm SL2.2in SL
Tank
90 × 30cm36 × 12in
Temp
16–22°C61–72°F
pH
6.0–8.0

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...

Moderate
Specimen from Thailand.

Hypsibarbus vernayi

Cyprinidae · Norman, 1925

Max length
216mm SL9in SL
Tank
240 × 60cm96 × 24in
Temp
20–26°C68–79°F
pH
6.0–8.0

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.

Moderate
Specimen from Thailand.

Mystacoleucus greenwayi

Cyprinidae · Pellegrin & Fang, 1940

Max length
100mm SL3.9in SL
Tank
120 × 45cm48 × 18in
Temp
20–27°C68–81°F
pH
6.0–7.5

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,...

Easy
Adult individual.

Datnioides pulcherSiamese Tiger Perch

Datnioididae · Kottelat, 1998

Max length
400mm SL16in SL
Tank
not recorded
Temp
20–28°C68–82°F
pH
5.5–7.5

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.

Moderate
1 field missing
Adult individual.

Channa maculataBlotched Snakehead

Channidae · Lacepède, 1801

Max length
300mm SL12in SL
Tank
not recorded
Temp
not recorded
pH
not recorded

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...

Difficult
3 fields missing
Specimen from the Nan River, Nan province, northern Thailand.

Garra theunensis

Cyprinidae · Kottelat, 1998

Max length
300mm SL12in SL
Tank
not recorded
Temp
not recorded
pH
not recorded

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...

Moderate
3 fields missing