The leopard dace is a Columbia endemic. It is abundant in gravel deposition reaches along the Fraser River. Curiously, with the exception of the lower Similkameen River, it is not common in the Columbia system. Its rarity in most of the Columbia system may be natural or may be a result of human intervention (dams). Although its general ecology is modestly well known, its reproductive biology is unknown. It is one of the species involved in the evolution, through an ancient hybridization event, of the Umatilla dace. The genetic relationships between leopard and Umatilla dace need more study — based on mitochondrial analyses, some populations group with Umatilla dace rather than with their own species. This may reflect past hybridization.
Source: Information provided by Don McPhail for E-Fauna BC.
North America: Fraser and Columbia River drainages in British Columbia in Canada, Washington, Oregon and Idaho, USA.
. Page, L.M. and B.M. Burr 1991 A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p.