If looks like your sonar is set to normal mode. Turn it to max mode in Switchfire. This will give you stronger readings and will help you find fish when in normal mode you aren't getting strong readings. Pics 4 and 5 are showing a large bait school in the side scan because it is so dense and the bait are closely packed. There are fish under the school, as shown by the broken pixels, but they would be much more visible on sonar in Switchfire.
Capt. Craig Copeland
2013 Nautic Star 2110 Shallow Bay Boat
Humminbird HELIX 12 CHIRP MEGA SI GPS G2N
Nautic Star Boats Pro Staff (nauticstarboats.com)
Redneck Fish'n Jigs Pro Staff (redneckfishn.com)