Swirling or Turbulent Current.

[Andrwhite610]

Are those wild or stocked? 😁

Look at those hard edged tail fins how could they be stocked 😅

 

[troutbert]

Just throw a green weenie (sinking green inchworm) out there and see what happens.

 

[krayfish2]

Basically, I look for converging currents. The seam where slower current meets the faster water is a good place to start. In your drawing, you have a swirling current behind the large boulder. In that scenario, the fish will face into the current which may actually make it facing downstream. Lastly, in heavy current areas, the water in the surface might be ripping but the water by the streambed is barely moving. There was a video on here a little while back that illustrated this. It's likely a fly scraping on the bottom may have a better chance of getting eaten.

 

[Swattie87]

Sometimes they are in a small pocket in front of that rock too depending on the bottom, flows, etc

One of my all time favorite takes was fishing a hopper/dropper, and casting above a good sized rock on a small freestone stream, intending to drift around the rock and catch a fish (most likely on the nymph) in the current seam below the rock. As the hopper pushed up against the upstream side of the rock, a Brown Trout snout poked up and ate the hopper. Always fish the cushion above the rock too was the lesson learned that day.