Cat-eLog Right Siluridae Right Ompok

Down Cat-eLog Data Sheet
Scientific Name Ompok bimaculatus  (Bloch, 1794)
Common Names Two Spot Glass Catfish
Toplettet Glasmalle (Denmark)
Type Locality Tranquebar [Tharangambadi], India.
Synonym(s) Callichrous bimaculatus, Callichrous chechra, Callichrous gangeticus, Callichrous macrophthalmus, Callichrus affinis, Callichrus nebulosus, Ompok siluroides, Phalacronotus siluroides, Pseudosilurus bimaculatus, Silurus bimaculatus, Silurus chechra, Silurus duda, Silurus microcephalus, Silurus mysoricus, Wallago microcephalus
Pronunciation Awm pok
Etymology The etymology of Ompok is unclear. It is believed to be a corruption of the Indonesian name for mid-sized silurid catfishes, limpok. The specific epithet comes from the Latin bis meaning two, and macula, meaning spot; in reference to the presence of two dark spots in this species.
Article Link - CotM Right 2005 Right November
Down Species Information
Size 450mm or 17.7" SL. Find near, nearer or same sized spp.
Identification The catfish genus Ompok La Cepède, 1803, consists of medium-sized silurid fishes found in inland waters throughout South and Southeast Asia. The genus is traditionally diagnosed by the presence of a short dorsal fin with 4 rays, strongly forked caudal fin, subcutaneous eye that is set immediately posterior to the mouth rictus and two patches of palatal teeth (Weber & de Beaufort, 1913). Bornbusch (1995) showed that Ompok, as currently understood, is probably paraphyletic.

The two spots are found above and behind the pectoral-fin base and the other at the base of the caudal peduncle. The fish often idebntified as O. bimaculatus (and most commonly encountered in the aquarium trade) is a Southeast Asian species, Ompok siluroides which has a rounder head and a mottled brown colouration, while O. bimaculatus are silvery and have a sharper head.
Sexing Males are more slender and have strong serrations on the posterior edge of the pectoral spine (females lack these serrations).
Down Habitat Information
Distribution Asia: Afghanistan to China, Thailand and Borneo. Endangered status in the Western Ghats, India.
Thailand Waters (click on these areas to find other species found there)
Cambodia waters (click on these areas to find other species found there)
Pacific, Malaysia Waters (click on these areas to find other species found there)
Indian waters (click on these areas to find other species found there)
Bangladesh Waters (click on these areas to find other species found there)
Pacific, Greater Sunda Island Rivers, Borneo Waters (click on these areas to find other species found there)

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IUCN Red List Category Near Threatened, range map and more is available on the IUCN species page. Last assessed 2009.
pH 6.4 - 7.4
Temperature 20.0-26.0°C or 68-78.8°F (Show species within this range)
Down Husbandry Information
Feeding Readily feeds on live/frozen foods and other prepared foods such as pellets. Will also eat small fishes/shrimps.
Furniture Provide plenty of hiding spaces in the form of driftwood or PVC pipes. Prefers an area of open water when active. Current preferred.
Compatibility A relatively peaceful species that is compatible with most fish of equal size or larger. Not safe with small fishes.
Breeding Not known in the aquarium. Has been bred using hormone injections in India. See also Photoperiod manipulation leads to successful voluntary captive spawning of butter catfish Ompok bimaculatus during the non-spawning breeding season.
Breeding Reports There is no breeding report.
Down Further Information
Reference Naturgeschichte der ausländischen Fische v. 8, pp 24, Pl. 364.
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Last Update 2022 Aug 16 01:22 (species record created: 2005 Apr 17 00:00)