the chinook salmon oncorhynchus tshawytscha also called king salmon. fish on their way to spawning, view from ballard locks in

animal area bank beautiful biology breeding chinook construction dam egg energy environment fish fishway flowing for force freshwater gorbuscha green ground grounds humpbacked hvital king ladder lax laying life migration nature oncorhynchus pass river run salmon season spawn spawning steps stream struggle survival swimming threshold underwater upstream vital vitality water weir wild wildlife