Distribution:The species lives around the Pacific Rim from Japan through Alaska, British Columbia, Washington, Oregon, and California, down to Baja California, Mexico.
Class:Cephalaspidomorphi
Habitat:Some lampreys are restricted to freshwater, whereas others spend a portion of their life in the ocean and return to freshwater to spawn (anadromy).Typical spawning habitat is similar to salmon or steelhead trout, low-gradient rivers and streams.