These are Zebra Mussels that came into this area about 10 years ago from the ballast of ocean going ships. They have spread into most of the great lakes and a have become an invasive pest that are costing billions of dollars in damage. Every Spring there is a new batch of Zebra Mussels shells that are washed onto shore. The east side of Green Bay used to have sandy beaches but now has Zebra Mussel beaches.
The bottom picture shows drifts of the shells built up over several years.
2 comments:
Very interesting pictures. I can't believe those are all shells! Your chosen picture is really effective though, with a lovely shallow DOF. Nice work.
How serene!
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