This summer while I was pond fishing in Indiana, I regularly saw on the water these things that resembled what I used to call Pill-Bugs as a kid -- except not being near the water I never saw one in the water at that time. They were quite close to the shore.
The ones I saw were there by the dozens, and actively swimming in circles amongst themselves.
My brief Internet search suggests I may possibly not be far off on what I saw.
Please further my knowledge a bit, if you can. Assuming the fish would be interested, what would you tie to imitate these, and how would you fish it? : )