Looks like there are quite a few fish in both images.
In the first one, there appears to be a school of fish that are suspended a little because you can see the shadows. There is a larger suspended fish above and to the left. It looks like it is suspended quite a bit higher because the distance the shadow is away from the fish.
In the second one, look like you may have your sensitivity a little to high and the fish are harder to separate from the background. It looks like the school of fish are in the same place, but maye a little closer to the bottom.
What kind of fish are you looking for? The school at the cursor look smaller....maybe bluegill or crappie. The one by itself may be a bigger bass.
I am not great at this yet either, just my 2 cents.