National Geographic News


"Sockeye Leaping Brooks Falls, Katmai National Park"

Salmon are anadromous—a word that literally means "up-running," but which refers more specifically to their ability to live in both fresh and salt water. This rare evolutionary trait enables salmon to take advantage of both environments. The relative safety of fresh water allows them to breed where there are fewer predators, while the abundant resources of the ocean allow them to grow larger and therefore reproduce in greater numbers.

Photograph by Greg A. Syverson
Book Title:
Rivers of Life: Southwest Alaska, The Last Great Salmon Fishery
Aperture Foundation, Inc.

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