Took my wife out on our kayaks, as we paddled out we encountered a white bass school.
Not sure how long it was going on, but it was certainly dying out as we got there.
I'm sure me paddling over it didn't help, but in my defense, there was no surface activity where I was paddling.
I saved the graphs in case anyone was interested. I pulled a few keepers out, but didn't take any pictures as I'm still far too afraid to use my phone on the water.
It wasn't a big school, but for me it is interesting to see how my sounder works.
Truth be told, I didn't even notice at the time that I was over the school. Either I was too focused on fishing or the giant depth reading covered up any surface activity I would have been seeing.
Having a recording of fish really helped me out with adjusting my settings though. I went and played the recording on my unit and paused it at the moment the fish were on the screen. This let me adjust the sensitivity and colors to the point that the fish jump out at me, while still being able to see structure and shadows.