The Coastal-Puget Sound distinct population segment (DPS) of bull trout is the only anadromous (utilize fresh and marine habitats) population of bull trout within the continental United States. Bull trout within this DPS rear in natal streams then migrate to the saltwater environment to mature. Bull trout require clean cold water and are iteroparous (they survive to spawn year after year) and therefore need an unobstructed passage both upstream and downstream. These habitat requirements have made the bull trout very susceptible habitat change and degradation.  The bull trout is currently Blue listed by British Columbia, a candidate for listing by both Washington state and the Canadian Federal Government, and listed as Threatened by the United States Federal Government. For more information, please see the U.S. Fish and Wildlife’s Draft Recovery Plan for the coastal-Puget Sound distinct population segment of Bull Trout at http://ecos.fws.gov/docs/recovery_plans/2004/040701c.pdf