The bill, known as the Northwest Endangered Salmon Predation Prevention Act of 2026, amends the Marine Mammal Protection Act to allow for the lethal taking of pinnipeds to protect endangered salmonids in the Columbia River and its tributaries. It establishes a permitting process for intentional lethal takings and requires the Secretary to report on pinniped populations and predation's impact. Additionally, it mandates the establishment of a technology accelerator for pinniped exclusion and a study on the impact of these actions on salmon and steelhead recovery. Finally, it also outlines regulations and definitions related to eligible entities and Indian Tribes involved.