One of the funnest photos to try-- salmon jumping towards a brown bear's wide open jaws. Best done when the salmon are running thick and the bears aren't chasing left and right. My strategy was to compose the shot with back button focus set on the bear's mouth or eye. Then I would pretty much forget about the bear and watch for the salmon to jump. That's when I would press the shutter. Essentially I was using the fish to photograph the bear. ;-)
Katmai National Park, Alaska. 2018