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Pseudobagarius inermis (Ng & Kottelat, 2000)  

Image contributors to this species:

Nonn Panitvong (1) Kamphol Udomrittiruj (1) Fishes of Mainland Southeast Asia (2)

ScotCat Sources:


Other Sources:

Fishbase  Google Search  All Catfish Species Inventory  Blog Page

Relevant Information:

Dorsal spines (total): 1; Dorsal soft rays (total): 4 - 5; Anal soft rays: 8 - 11; Vertebrae: 31 - 35. Can be differentiated from its congeners in the following characters: lacking distinct serrae on posterior edge of pectoral spine; adipose fin with moderately long base, its length 13.4-16.7 %SL; eye diameter 7-10 %HL; length of nasal barbel 38-57 %HL; tip of snout noticeably in front of apex of lower jaw; large anterior and posterior nostrils present, closely situated together and separated only by base of nasal barbel; caudal fin with 7+7-8 rays; branchiostegal rays 6-7; a light yellow snout with a sharp contrasted edge; color pattern consisting of dorsal and ventral light yellow patches on the body that sometimes coalesce at mid-height of the flank. Pseudobagarius inermis has been found in various habitats from swift creek to riffles in streams and rapids in large rivers. All habitats had in common a stony (gravel to boulder) substrate and relatively swift current. In most of them the water was clear in the dry season.

Common Name:



Akysis inermis




Asia: Xe Banghiang and Xe Kong drainages of the Mekong River drainages in southern Laos. Type locality: Laos: Attapeu province: unnamed creek entering Xe Kaman from the north at proposed Xe Kaman dam site, 14º57'40"N, 107º09'16"E.


3.5cm (1¼ins) sl.


18-24°C (63-75°F)




Froese, R. and D. Pauly. Editors. 2008.FishBase. World Wide Web electronic publication. www.fishbase.org, version (09/2008).
Ferraris, C.J. Jr. 2007 Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types. Zootaxa 1418:1-628.



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