In the 1960s, king salmon were abundant in Alaska, and it stayed that way through the 90s. After the new millennium, though, Chinook numbers fell — and they've remained low since.
"People have scratched their heads and said, 'Where are all the kings? What happened to all the kings?'" said Andy Seitz, an associate professor at the University of Alaska Fairbanks School of Fisheries and Ocean Sciences.