These anadromous, parasitic fish inhabit the Pacific coasts of North America and Asia. They spend most of the life cycle as larvae, living in freshwater – around 3-7 years. Adults live 1-2 years at sea, parasitizing other fish and sperm whales. The return to freshwater to spawn, typically in habitats similar to salmon and trout. Pacific lamprey are an important ceremonial food source to Native Americans in the Columbia River basin and the Yurok tribe in Northern California.