If they are in fact Zebra
Mussels that is very sad,
The mussels have been jamming intake pipes in the Great Lakes but a side effect is that they are cleaning the water of effluent, ect. Not pleased to see an introduced species but maybe nature will balance things in time. The chesapeake bay used to be gin clear but oysters are no longer abundant and run off still needs to be lowered.
Murf
