Since marine mammals were federally protected, the only course of action for federal and state officials was to find a ...

Sea lions in Longview pose problems for Columbia River fishermen, risking the future of salmon and steelhead, and leading to animal control legislation.

Sea lions in Longview pose problems for Columbia River fishermen, risking the future of salmon and steelhead, and leading to animal control legislation.

A sea lion escaped from its pool at the Central Park Zoo on Friday amid the severe flooding in New York City, officials said.

A sea lion tosses a partially eaten salmon in the Columbia River near Bonneville Dam. (AP Photo/Don Ryan, File) SEATTLE -- Approval to kill up to 840 sea lions in a portion of the Columbia River ...

California and Steller sea lions travel 145 from the mouth of the Columbia River to Bonneville Lock and Dam to eat returning adult salmon as they enter the fish ladders. (Photo: U.S. Army Corps of ...

Some sea lions follow their prey about 150 miles up the river, until they all hit the bottleneck created by the Bonneville Dam.

File - In this May 4, 2010, file photo, a sea lion tosses a partially eaten salmon in the Columbia River near Bonneville Dam, where six more sea lions were trapped earlier in the day with one to ...

California sea lions at Bonneville Dam were a rarity until they started showing up in the early 2000s. Authorities began the lethal removal list in 2008.

A sea lion tosses a partially eaten salmon in the Columbia River near Bonneville Dam on May 4, 2010, where six more sea lions were trapped earlier in the day with one to be euthanized, in North ...

Salmon and steelhead congregate near the bottom of Bonneville Dam to go up fish ladders, facing some delays in "getting through the pinch points, and sea lions have figured that out." ...