ML is right about the Steelhead. I forgot about those even though I fish for them every November up in Erie on Elk Creek. Biggest one I've ever caught was 11 pounds.

With that in mind, you could rate fish within weight categories. <1 lb., 1-5 lbs., 5-10 lbs. etc.

Excerpt from Robert Crais' "The Monkey's Raincoat:"
"She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."