I can't tell which way the water is flowing in the picture. I sure wouldn't be standing where the angler is.

I agree with the above that there's a good fish in the recess along the rock (and under the bush) -- shelter from aerial attack, food from terrestrials dropping off the bush.

However if the flow is from the top of the picture, I'd certainly also be investigating the sharp bend at the end of the rock wall as well. The incoming water may have washed out a deep spot there, and a fish in it would get first shot at any food being washed down into the pool. The spot is probably a bit less desirable if the flow is from the bottom of the picture.