U.S. Fish and Wildlife Service extinction "Pacific Salmon, (Oncorhynchus spp.)" endangered anadromous salmon .html "Pacific Salmon, (Oncorhynchus spp.)" salmon life cycle and spawning U.S. Fish & Wildlife Pacific Salmon, (Oncorhynchus spp.) Pacific Salmon, (Oncorhynchus spp.) salmon life cycle and spawning Pacific salmon Pacific Salmon, (Oncorhynchus spp.) “Pacific Salmon, (Oncorhynchus spp.)” grotesquely humped backs “Pacific Salmon, (Oncorhynchus spp.)” U.S. Fish and Wildlife Service Salmon's lifecycle Pacific salmon (Oncorhynchus spp.). salmon U.S. Fish and Wildlife Service endangered anadromous salmon extinction * http://www.fws.gov/species/species_accounts/bio_salm.html U.S. Fish & Wildlife U.S. Fish and Wildlife Service U.S. Fish and Wildlife Service Pacific salmon Pacific Salmon, (Oncorhynchus spp.)