Neolissochilus hexagonolepis

Neolissochilus hexagonolepis, the copper mahseer, chocolate mahseer or katli, is a species of freshwater ray-finned fish belonging to the family Cyprinidae, the family which includes the carps, barbs and related fishes.^[3] This species is found in Nepal, eastern India, Bangladesh, Myanmar, Thailand, Malaysia and Sumatra. It may also be present in China and Viet Nam, also the record sof this species from the easyetn part of its range is uncertain and reports may be misidentifications.^[1]

Neolissochilus hexagonolepis
Conservation status
Near Threatened  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Cypriniformes
Family:	Cyprinidae
Genus:	Neolissochilus
Species:	N. hexagonolepis
Binomial name
Neolissochilus hexagonolepis (McClelland, 1839)
Synonyms[2]
Barbus hexagonolepis McClelland, 1839 Acrossocheilus hexagonolepis (McClelland, 1839) Barbodes hexagonolepis (McClelland, 1839)

In 2021, the Indian state of Sikkim declared the copper mahseer, locally called 'Katley' as the State fish.^[4]

Distribution

The fish is found in different altitudes of the state of Sikkim, mainly in the Teesta and Rangit rivers and their tributaries.^[4]

Endangered Status

In 1992, ICAR-National Bureau of Fish Genetic Resources, Lucknow categorized the fish as an endangered specie. In 2014, IUCN, categorized it as an endangered specie.^[4]