Pitts -
Those are all Rogue Holy Water fish - technically and ODFWlegally speaking there are no steelhead in the Rogue River above the diversion dam at Cole Rivers Hatchery (largest hatchery in OR...)
Since the HW is planted from the hatchery I have no doubt that there may be genetic anomalies there, but that fish was also about 14" long. The parr marks would be much more faded if it were a steelhead, and it would be much further downriver, in a place where steelhead actually exist in the river...
That does bring up a good point, however, and made me think of this: Here in the Rogue Valley ODFW often dumps retread steelhead and hatchery lefovers in to the local lakes (especially Emigrant) where they instntly become rainbow trout in the eyes of the law... go figure.
Anyhow, if it were a "fry," technically speaking, it would be about 2-4 cm long. After that it would become a parr until it was about 10 cm, then a smolt until it hit the saltwater... "smolting" refers to a biological change that takes place in the fish, making it head towards the salt when it's about 6" or so long... it was too big to be a smolt, even if there were any in that section of the river.
Anyway, it was a uniquely colored rainbow in my book.
-Gus