An Alaskan salmon heading upstream to spawn. The majority of them will die along the way. At the point in the river where I took this picture, this one was very close to the end of the run. I can’t swear he (she?) made it to the end, but it’s a decent bet.
Also, of some three dozen shots of this point in the river, this is the only one where I actually can see a fish in the picture. So this picture was a minor success for me that day.