Don't know about Black Bears, but we have a couple of Grizzlies here in the Colorado Springs Cheyenne Mt Zoo. They have access to a pond that is stocked with trout and visitors frequently see them scooping the fish out with a fast swipe of their paws. Of course this involves frequent restocking with alot more trout. So far PETA has not filed a complaint as the trout are pretty much in a "shooting fish in a barrel" situation. Lots of fun to watch.

For what it is worth, I have in the past caught trout in streams using this technique, but of course with a fishing license which I suspect these grizzlies lack.