I see GAMs swarming like that peaking around July Early August each year where plants provide good habitat. What species do you have?

Where minnows congregate near the surface, watch for minnow sprays as they leap from the water to evade predators. For YP predation this may be more focused during low light.

It isn't what we don't know that gives us trouble, it's what we know that ain't so - Will Rogers