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Habitat: This species is known from blackwater habitats in the Kapuas, Kayan and Sebangau river drainages in western and southern Borneo. The estimated extent of occurrence (EOO) is estimated at 24640 km2 and area of occupancy is estimated to be 3960 km2. Based on the pervasive threat of peat swamp destruction due to land conversion, and given that this species is a blackwater obligate, the number of locations is considered no greater than 10. Given a limited number of locations, a restricted EOO, and a continuing decline in habitat quality, this species is assessed as Near Threatened under criterion B1ab(ii,iii) (IUCN 2018). Found in the Kapuas Lakes Area in Kalimantan Barat, Indonesia, fishermen reported that this species occurs in the upper reaches of main rivers among wood debris and sunken trees and logs. Aquarium Care: As with most of the genus, H. olyroides can become a pretty nasty character in your fish tanks and if housed with other fish can be lethal. Cichlids such as the Pikes from the Crenichla genus that can look after themselves would be the best bet for other tankmates. Although one of the smaller of the genus they can not to be trusted with other fish. If kept with other fish they will have to be able to look after themselves. Diet: Whilst this catfish is best described as a predator/carnivore in its natural habitat feedings of fish, insects, shrimps and other crustaceans, in captivity this catfish will feed on mussels, prawns, pieces of fish, earthworms and will even take prepared foods such as catfish pellets. Etymology: The genus name Hemibagrus: Hemi- half; bagrus- from 'bagre', a South American name for a catfish, but is only used for African and Asian species. The specific name olyroides: –oides, having the form of: referring to superficial resemblance to (and possible relationship with) Olyra. Remarks: This species is listed as near threatened in the IUCN Red List of Threatened Species 2018.

None

Mystus olyroides

Bagridae

Asia: Kapuas River, western Borneo. Type locality: Sintang Market (reportedly caught in Sungai Kebian), Western Borneo (Kalimantan Barat, Indonesia).

20.0cm. (8ins)

22-28°C (71-83°F)

6.5-7.2.

Ferraris, C.J. Jr., 2007. Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types. Zootaxa 1418:1-628.
Froese, R. and D. Pauly. Editors. 2011. FishBase. World Wide Web electronic publication. www.fishbase.org, version.
Kottelat, M. and E. Widjanarti, 2005. The fishes of Danau Sentarum National Park and the Kapuas Lakes area, Kalimantan Barat, Indonesia. Raffles Bull. Zool. Supplement (13):139-173.
Ng, H.H. 2020. Hemibagrus olyroides. The IUCN Red List of Threatened Species 2020.
The ETYFish Project Fish Name Etymology Database © Christopher Scharpf.