April 29, 1806, mouth of Walla Walla River, Oregon.
Slender; pikelike. Gray-green above; sides silver; lateral line arches downward. Head and snout long, flattened; mouth large; jaws of equal length; lacks barbels. Fins yellowish; 1 triangular dorsal fin; tail fin forked; ventral fins reddish in old males.
Lakes, pools, rivers.
Snake and Columbia River Basins of north, central, and southwest Idaho; northwest Montana; Puget Sound rivers, Lake Washington, Columbia, Snake, and Willamette tributaries.