Was at the farm yesterday for all of 15 min. Picking up items left there and dropping off others. Went down to the pond briefly to check water levels etc.. This was floating along part of the east side. The west wind had it pushed near the feeder. Is this algae? I’ve not seen this type before. I’m a cup half empty kind of guy. So, I’m assuming this isn’t good. Need more pics? I’m going back up to mow. Needless to say, I didn’t swim with this.
The dots are mostly about the size of dimes to quarters with a few half dollars thrown in.

9 yr old pond, 1 ac, 15' deep.
RES, YP, GS, FHM (no longer), HBG (going away), SMB, and HSB (only one seen in 5 yrs) Restocked HSB (2020) Have seen one of these.
I think that's about all I should put in my little pond.
Otter attack in 2023