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River

Xe Nam Noi

Only species with a profile on Seriously Fish are counted.

Species
2
Families
1
Photographed
2 of 2
Difficulty rated
2 of 2

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Adult specimens have deep orange/yellow borders to the paired fins. Also note the prominent tubercules on the snout.

Sewellia elongata

Gastromyzontidae · Roberts, 1998

Max length
75mm SL3.0in SL
Tank
90 × 30cm36 × 12in
Temp
20–24°C68–75°F
pH
6.0–7.5

Sewellia elongata is a hillstream loach from the Bolovens plateau in southern Laos, also recorded in the upper Se Kong drainage in central Vietnam. The largest described Sewellia, growing to at least 73 mm SL, it is most similar to S. diardi but has a relatively slender, elongate body. It appeared in the aquarium trade during 2010 and inhabits shallow, fast-flowing, highly-oxygenated headwaters with riffles and runs.

Moderate
This species is sometimes sold as 'Laos sucker' or 'Laos Sakura sucker'.

Sewellia speciosa

Gastromyzontidae · Roberts, 1998

Max length
55mm SL2.2in SL
Tank
75 × 30cm30 × 12in
Temp
20–24°C68–75°F
pH
6.0–7.5

Sewellia speciosa is a hillstream loach that appears endemic to the Xe Kong river drainage in central Vietnam and southern Laos. It first became available in early 2010 and sometimes appears on trade lists as 'Laos sucker' or 'Laos Sakura sucker'. The spotted body without stripes separates it from the morphologically similar S. lineolata, which is striped, and it inhabits shallow, fast-flowing, highly-oxygenated headwaters.

Moderate