Again trying to understand my Fish Finder, I got the depth to stop jumping around and cleared some of the surface clutter off the screen, also reduced the sensitivity down to like 7 on a scale of 1-20, most of my screens today were pretty clear and looked good but now i need to understand what im am looking at, if anyone could help me, here is just a picture i took today, I don't know what the blue stiff is and this was the only time it was on the screen. This was in a river and the depth lines read 0,2.5,5, and 7.5. So what am i looking here bottom wise and that blue stuff. Thanks

my untrained eyes are going to say grass with baitfish in it.  i could be wrong and probably am but thats what i would have thought if i saw it.

All I see is clutter from the sensitivity being set too high for that depth. Where you moving or stationary?

This is the same place with two different sensitivity settings:

Second image

Yea i was stationary when i took that,  I have the sensitivity at about 7, i think my surface clutter is at about 3-4, do you take ur clutter down to zero?

Also it was in Stain - dirty water.  If I would take my sensitivity up to 15-20 I would see nothing but red on my screen.

I wasn't on top of the same two trees, but this is a few feet away with a lower setting.

I don't now what the surface clarity setting was, I usally don't change it from the default setting.

Here is a thermocline with a setting of 10

Same thermocline with a setting of 3