Pacific Or Bust: Fingerling Chinook salmon are dumped into a holding pen Tuesday as they are transferred from a truck into the Sacramento River in Rio Vista, Calif. From here, they'll be towed downstream for a bit, then make their own way out to the Pacific Ocean. Justin Sullivan/Getty Images hide caption

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Truckin': Salmon Take A Long, Strange Trip To The Pacific Ocean

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Bright red sockeye salmon swim up the Fraser River to the stream where they were hatched. Current Biology, Putman et al. hide caption

toggle caption Current Biology, Putman et al.