A scene of the estuaries of Pleistocene era California depicting a scavenging short-faced bear, Arctodus simus, feeding off a spawned-out female Oncorhynchus rastrosus, the "saber-toothed" salmon, with an entourage of ancestral California gulls, Larus californicus. In the water, a pair of speculative ocean-phase Oncorhynchus enters the estuary looking for food, while a pair of spawning males jockey for status and position, ready to meet their fate upstream.