This question comes up a lot. w/o a photo it is tough to guess. With a photo, you can guess, but correctly? I usually base my guess on the fish's condition. Brightness, transluscence, and thicker fish as signs of ocean travel.
I have a pet theory: all rivers with summer steelhead have at least some component of a half-pounder life history, provided the halfpounders can reach suitable spawning grounds. Got this WAG because I've found them on rivers that aren't known to support them.
The best way to deal with this in the future is to remove a scale and either learn to read it yourself, or send it to your local fish biologist
I have a pet theory: all rivers with summer steelhead have at least some component of a half-pounder life history, provided the halfpounders can reach suitable spawning grounds. Got this WAG because I've found them on rivers that aren't known to support them.
The best way to deal with this in the future is to remove a scale and either learn to read it yourself, or send it to your local fish biologist