Might be bryozoans. There is a picture on page 10 of the current issue of PBM. I've got the latest issue up at the farm, I'll take a look when I go back to spread more rock. Thx
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
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