I dont have any willows anywhere near the pond, but it sure looks very similar. I think I may have mentioned thinking it was some kind of bug or tree refuse that blew into the pond.

I'm glad I'm not the only one who's experienced this condition... as long as it's not a plague!!!

Thanks for following up with me. Very much appreciated

.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!!