This specimen appears to be of the same species as this one collected in the same spot two months earlier. The identification of both is tentative. This one suffered some physical damage before being photographed, too, so the colors aren't totally natural. I was mostly photographing it to test out some new camera setting idea, which worked really well for a couple of closeups.
This prolific genus is most important in lakes, spring ponds, and beaver ponds, but some of its species do well enough in spring creeks and slow pools to be important to trout there.