While at Big Beef Creek, in Grad School, I trapped two male coho one day. Somewhere I may have pictures, To the ounce they weighed the same but one was long and skinny while the other was short and rotund.

Like you, Tug, I got pretty good at knowing the size of the small salmonids (in-stream) as we measured tens of thousands. Must admit, too, that some on the end of the line "might" have been a tad bigger.