Ompok is a genus of fishes in the family Siluridae found in lakes and large rivers throughout South and Southeast Asia.
Taxonomy 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 and O. miostoma), the O. eugeneiatus group (i.e. O. eugeneiatus and O. pinnatus), the O. hypophthalmus group (i.e. O. hypophthalmus, O. rhabdinurus and O. urbaini) and the O. leiacanthus group (O. fumidus, O. jaynei and O. leiacanthus).Bornbusch, A.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): 1–46.Ng, H.H. (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.Ng, H.H. (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. On the other hand, the monophyly of these species groups is not strong enough to reassign species to other genera.Ng, H.H. & Tan, H.H. (2004): Ompok platyrhynchus, a new silurid catfish (Teleostei: Siluridae) from Borneo. Zootaxa, 580: 1–11.
The O. eugeneiatus group is likely to be more closely related to Kryptopterus than the other Ompok species. According to Ferraris O. eugeneiatus has been reclassified into Kryptopterus, however O. pinnatus has not.Ferraris, C.J.Jr. (2007): Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types. Zootaxa, 1418: 1–628.
Species There are currently 28 recognized species in this genus: Ompok argestes Sudasinghe & Meegaskumbura, 2016Sudasinghe, H. & Meegaskumbura, M. (2016): Ompok argestes, a new species of silurid catfish endemic to Sri Lanka (Teleostei: Siluridae). Zootaxa, 4158 (2): 261–271. (Wetzone butter catfish) Ompok bimaculatus (Bloch, 1794) (Butter catfish) Ompok binotatus H. H. Ng, 2002 Ompok borneensis (Steindachner, 1901) Ompok brevirictus H. H. Ng & Hadiaty, 2009 Ompok canio (F. Hamilton, 1822) Ompok ceylonensis (Günther, 1864) (Dryzone butter catfish) Ompok eugeneiatus (Vaillant, 1893) (Malay glass catfish) Ompok fumidus T. H. T. Tan & P. K. L. Ng, 1996 Ompok goae (Haig, 1952) Ompok hypophthalmus (Bleeker, 1846) Ompok javanensis (Hardenberg, 1938) Ompok jaynei Fowler, 1905 Ompok karunkodu H. H. Ng, 2013 Ng, H.H. (2013): Ompok karunkodu, a new catfish (Teleostei: Siluridae) from southern India. Zootaxa, 3694 (2): 161–166. Ompok leiacanthus (Bleeker, 1853) Ompok malabaricus (Valenciennes, 1840) (Goan catfish) Ompok miostoma Vaillant, 1902 Ompok pabda (F. Hamilton, 1822) (Pabdah catfish) Ompok pabo (F. Hamilton, 1822) (Pabo catfish) Ompok pinnatus H. H. Ng, 2003 (Long-fin glass catfish) Ompok platyrhynchus H. H. Ng & H. H. Tan, 2004 Ompok pluriradiatus H. H. Ng, 2002 Ompok rhadinurus H. H. Ng, 2003 Ompok sabanus Inger & P. K. Chin, 1959 Ompok siluroides Lacépède, 1803 Ompok supernus H. H. Ng, 2008 Ompok urbaini (P. W. Fang & Chaux, 1949) Ompok weberi (Hardenberg, 1936)
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