Steelhead spawning - Oncorhynchus mykiss This is a reproduction of a male spawning Steelhead. This Steelhead is a reproduction 19.5 lbs. and 36 3/4" long. Steelhead of this size are true trophies and make the most beautiful mounts. Here in Southeast Alaska, The Alaska Department of Fish And Game mandates to retain a Steelhead, it must be 36" or bigger. So, if you happen to catch one under the 36" mark, we can create a one of a kind reproduction for you.