''Percopsis transmontana'', the sand roller, is a species of percopsiform fish endemic to the

Columbia River The Columbia River (Upper Chinook: ' or '; Sahaptin: ''Nch’i-Wàna'' or ''Nchi wana''; Sinixt dialect'' '') is the largest river in the Pacific Northwest region of North America. The river rises in the Rocky Mountains of British Columbia, C ...

drainage in the northwestern United States. This species grows to a length of TL. Sand rollers can live up to 6 years in slow-moving, sandy-bottomed streams and rivers among vegetation. Their diet includes flies and Trichoptera, although juveniles also have been known to eat crustacean zooplankton.

References

* Percopsiformes Freshwater fish of the United States Fish described in 1892 {{Percopsiformes-stub