(Portland, OR) -- The bounty for catching northern pikeminnow in the Columbia and Snake rivers is going up this year. It's the first increase since 2015. Bounties of six, eight, or ten dollars will be paid for each fish over nine inches long. Northern pikeminnow, which aren't native fish, eat millions of young salmon each year. The Bonneville Power Administration pays the bounty to reduce the number of pikeminnow in the rivers. Some anglers make thousands of dollars each year catching the fish.