2025 Sea Lion Predation At Bonneville Dam: 3.6 Percent Of Spring Chinook, 5.5 Percent Of Steelhead, Sturgeon Consumption ‘Demands Attention’

Of the fish that had passed Bonneville Dam last spring, California and Steller sea lions consumed 3.6 percent of the spring Chinook salmon and 5.5 percent of the steelhead. Some 98 individual sea lions were responsible for this predation, according to a recently-released annual report by the U.S. Army Corps of Engineers.