I had a plethora of little black 'poles last year. They couldnt have been more than 3/8" long. I think they were rain frogs. Regardless, the entire pond's shallows were covered with them on one evening, the next morning they were almost all gone. BG absolutely decimated them overnight.

.10 surface acre pond, 10.5 foot deep. SW LA. The epitome of a mutt pond. BG, LMB, GSF, RES, BH, Warmouth, Longear Sunfish, Gambusia,Mud Minnows, Crappie, and now shiners!!...I subscribe!!