The first question for many people is whether Warren’s fish was actually a trout. DuPont tells us the answer is complicated, because the river is also home to wild and hatchery-released steelhead. "IDFG stocks rainbows in Dworshak Reservoir, and there are thousands of steelhead stocked every year in the Clearwater," he says. "Some of those fish don’t go to the ocean; they stay in the river. Genetically, a steelhead and rainbow trout are exactly the same, the only difference is one goes to the ocean and one doesn’t. In fact, steelhead can have offspring that never go to the ocean, hence they’re rainbows, and you can have rainbows with offspring that go to the ocean, and those we consider steelhead. So from a rule and scientific perspective, if the fish went to the ocean, it’s considered a steelhead. If it does not go to the ocean, it is a rainbow of some kind."