Distribution trend of Schizothorax richardsonii (Gray, 1832) in Nagaland

In the present investigation, Schizothorax richardsonii (Gray) only representative of the sub-family Schizothoracinae recorded in Nagaland waters is taken stake of. Schizothorax richardsonii (Gray) commonly known as Alwan snow trout in English, and in various tribal names in Nagaland like Kahanei (Zeliang), Khothevü (Angami), Nguchi (Khiemungans), Khangu (Chakhesang), Mesha (Pochury), Kaepun (Yimchunger), Akhanu (Sema) and Nyetao (Konyak) is mostly found in the torrential upland rivers in Nagaland. The distribution trend of this important fish species in Nagaland rivers is presented.