Oncorhynchus mykiss — a cold-water salmonid native to Asia and North America
The US Interior Department has proposed a flexible framework to spare some Lower Basin states from mandatory cuts for now, with deeper reductions possible in drier times. California, Nevada and Arizona would share halves of the cuts, tied to priority water rights, and the plan would be revisited every two years as conditions change. The move aims to keep the river reliable for millions while addressing drought and climate change.