Oncorhynchus rastrosus
[4] They first appeared in the late Miocene in California, then died out some time during the Early Pliocene.[6][1][5] Members of this species had a pair of small "fangs" protruding from the tip of the snout, thus explaining the common name and synonym.[5] The salmon's spike teeth grew in size as it transitioned from life in the ocean to fresh water.Tooth wear patterns suggest the salmon used its teeth to defend territory and mark nests during the breeding phase.[1] The species was first described in 1972 from remains found in the Madras Formation near Gateway in Jefferson County, Central Oregon.