The official said the state government has declared Neolissochilus hexagonolepis commonly known as Copper Mahseer and locally named as 'Katley' as a state fish to highlight the importance of the fish and to give emphasis to its conservation measures.

In the year 1992, ICAR-National Bureau of Fish Genetic Resources (ICAR-NBFGR), Lucknow had categorized Katley fish as endangered species.

Land area: 7,096 km².
Capital: Gangtok
Governor: Ganga Prasad
Population: 6.19 lakhs (2012)
Chief minister: Prem Singh Tamang