Successful spawning of interior Coho, Kokanee and Sockeye Salmon was accomplished. Spawning salmon species of sockeye, chum, and coho can be seen in Portage Creek. Coho, freshwater sockeye, and Atlantic salmon have been established in Patagonia, as well. Commercial fisheries include the world's largest sockeye salmon fishery. Kokanee is also a name for landlocked Sockeye salmon. Idaho's Snake river once teemed with sockeye salmon. There are also smaller numbers of chum and sockeye salmon. Only spring chinook and sockeye salmon have higher levels of fat in their meat. Sockeye salmon are semelparous, dying after they spawn. Sometimes sockeye salmon males behave aggressively towards subordinate males. Sockeye salmon do not feed during reproduction. The Kvichak River is the world's most productive watershed for sockeye salmon. One interesting case involving speciation with salmon is that of the kokanee (landlocked) sockeye. There is some morphological divergence between the kokanee and sockeye. There are many reasons why Sockeye Salmon in the Snake River are reduced in number.