33′: Bugs or bubbles coming off deep mud. The thicker mark here wouldn’t really interest me because it might be one fish and faint, meaning small or debris. This one depends. If it is fish dispersed, I’d hit it by covering ground by trolling or present them with something that moves, bottom bouncer, or lindy.
11′: Weeds
16′: Probably a smallie arch. Would definitely hit this if I was looking for smallies, or if I had intel that said it might be a walleye up shallow.
12′: Weeds
23′: Bait ball possibly with something under it that is planning to feed. Could be any of the above, walleye, perch, smallie. I’d try for him to see what it was. Mainly because that would be an aggressive fish that wants to eat something. Can always release it.