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Ompok bimaculatus Day.jpg
Butter Catfish O. bimaculatus
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Siluriformes
Family: Siluridae
Genus: Ompok
Lacépède, 1803
Type species
Ompok siluroides
Lacépède, 1803

See text.

  • Callichrous
    Hamilton, 1822
  • Pseudosilurus
    Bleeker, 1857
  • Silurodes
    Bleeker, 1857

Ompok is a genus of sheatfishes native to Asia.[1]

They are sometimes called "butter catfishes", but this can also refer to the African genus Schilbe of the family Schilbeidae.


The genus is recognized to be paraphyletic. The species of Ompok have been grouped into species groups, such as the Ompok bimaculatus group (i.e. O. bimaculatus, O. malabaricus, O. miostomus), the O. eugeneiatus group (i.e. O. eugeneiatus, O. pinnatus), the O. hypophthalmus group (i.e. O. hypopthalmus, O. rhabdinurus, O. urbaini), and the O. leiacanthus group (O. fumidus, O. jaynei, O. leiacanthus).[2][3][4][5] On the other hand, the monophyly of these species groups is not strong enough to reassign species to other genera.[6]

The O. eugeneiatus group is likely to be more closely related to Kryptopterus than the other Ompok species.[2] According to Ferraris O. eugeneiatus has been reclassified into Kryptopterus, however O. pinnatus has not.[1]


There are currently 27 recognized species in this genus: [7][8]

The taxonomic position and/or validity of several of the above species is uncertain and further studies may result in the removal of those species from the species list.

Distribution and habitat[edit]

Ompok species are usually found in lakes and large rivers throughout South and Southeast Asia.[3]


  1. ^ a b Ferraris, Carl J., Jr. (2007). "Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types" (PDF). Zootaxa 1418: 1–628. 
  2. ^ a b Bornbusch, Alan H. (1995). "Phylogenetic relationships within the Eurasian catfish family Siluridae (Pisces: Siluriformes), with comments on generic validities and biogeography". Zoological Journal of the Linnean Society 115: 1–46. doi:10.1006/zjls.1995.0032. 
  3. ^ a b Ng, Heok Hee (2003). "A review of the Ompok hypophthalmus group of silurid catfishes with the description of a new species from South-East Asia". Journal of Fish Biology 62 (6): 1296–1311. doi:10.1046/j.1095-8649.2003.00107.x. 
  4. ^ Ng, Heok Hee (2003). "Ompok pinnatus, a new species of silurid catfish (Teleostei: Siluriformes: Siluridae) from mainland Southeast Asia". Proceedings of the Biological Society of Washington 116 (1): 47–51. 
  5. ^ "Catfishes of the Ompok leiacanthus (Bleeker, 1853) Species Group (Teleostei: Siluridae) from Southeast Asia, with Description of a New Species". The Raffles Bulletin of Zoology 42 (2): 531–542. 1996. 
  6. ^ Ng, Heok Hee; Tan, Heok Hui (2004). "Ompok platyrhynchus, a new silurid catfish (Teleostei: Siluridae) from Borneo". Zootaxa 580: 1–11. 
  7. ^ Froese, Rainer, and Daniel Pauly, eds. (2013). Species of Ompok in FishBase. April 2013 version.
  8. ^ a b Ng, H.H. (2013): Ompok karunkodu, a new catfish (Teleostei: Siluridae) from southern India. Zootaxa, 3694 (2): 161–166.
  9. ^ Ng, Heok Hee (2008). "Ompok supernus, a new catfish (Teleostei: Siluridae) from Borneo". Zootaxa 1877: 59–68.