when the salmon are running - male of humpback salmon (oncorhunchus gorbusha)

alaska aleutian animal area bank biology bottom breeding clear commander egglaying energy fish food force freshwater goldfish gorbuscha ground grounds humpback humpbacked islands lax laying life migration nature oncorhynchus ouananiche pink rift river run running salar salmo salmon salmonrun season shallow site spawn spawning stream streams upstream vital vitality water when wild wildlife