''Kryptopterus geminus'' is a species of

catfish Catfish (or catfishes; order Siluriformes or Nematognathi) are a diverse group of ray-finned fish. Named for their prominent barbels, which resemble a cat's whiskers, catfish range in size and behavior from the three largest species alive ...

belonging to the family

Siluridae Siluridae is the nominate family of catfishes in the order Siluriformes. About 105 living species of silurids are placed in 12 or 14 genera. Although silurids occur across much of Europe and Asia, they are most diverse in Southeast Asia, beyond ...

. It can be distinguished from all its congeners, with the exception of '' Kryptopterus cryptopterus'', by the almost flat

dorsal Dorsal (from Latin ''dorsum'' ‘back’) may refer to: * Dorsal (anatomy), an anatomical term of location referring to the back or upper side of an organism or parts of an organism * Dorsal, positioned on top of an aircraft's fuselage * Dorsal c ...

profile with no concavity behind the head. This species grows to a length of SL. Examples of this distinctively shaped, translucent fish used to be assigned to the long-established species ''K. cryptopterus'' but recent studies have shown several small but consistent differences which prompted the erection of this new species. It has been recorded in

Cambodia Cambodia (; also Kampuchea ; km, កម្ពុជា, UNGEGN: ), officially the Kingdom of Cambodia, is a country located in the southern portion of the Indochinese Peninsula in Southeast Asia, spanning an area of , bordered by Thailan ...

, Laos,

Thailand Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is b ...

and

Vietnam Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...

. ''K. geminus'' can be distinguished from this close relative by its narrower head, longer snout, longer anal fin and eyes located much more laterally.

References

Siluridae Catfish of Asia Fish of the Mekong Basin Fish of Cambodia Fish of Laos Fish of Thailand Fish of Vietnam Fish described in 2003 {{catfish-stub