[GulfCoastAquarian]

The best success I have had with focusing is 1) to take a dozen pictures (a few of which, will be perfectly in focus) or 2) for a more sure method, mine has this feature where it will outline (with a small red box) in the viewfinder what it is focusing on. If you see it focusing on something in the foreground or back ground, hit the focus/shutter button again and it will try to find something else to focus on. Of course, for fast-moving fish, they will by now have moved on to the something more interesting than posing for you, but it works great for inanimate or slow-moving objects.