I've never targeted carp, other than when I was a young kid with a can of corn, or that time 15 years ago at the palace of Versailles in France when I used my finger as bait to catch a carp out of a canal (pictures below for proof. The look on other tourists faces was priceless).
I've fished a small local lake a few times lately. It is relatively shallow, murky water full of algae, plenty of structure around the perimeter, mostly fished for bass.
I've observed carp around the edges exhibiting a couple of behaviors:
1) slurping the surface in small groups. I don't see anything visible, so whatever they're eating (if they're eating) must be tiny.
2) Hanging out individually in a few inches of water, dorsal fin sometimes breaching the surface. Usually in areas with grass or roots, and can be spotted by the grass waving around. Looks to me like they're eating something off the bottom, but I don't know.
In both of those cases, they are easily spooked if they see me, and they aren't interested in my bass lures.
I want to try catching them on my tenkara fly rod, as I could sneak up and dangle something on top of them without them seeing me.
So my question is twofold...
What are they actually doing in these situations, and more importantly, what fly pattern would they take?