Found by Applied Ecological Sciences on the shoreline of Sycamore Island in May 2008
This pond was full of these freshwater clams. Above some you could see a current of water streaming from their valve.
Unionoida is an order of freshwater mussels, aquatic bivalve mollusks. The order includes most of the larger freshwater mussels, including the freshwater pearl mussels. All have in common a larval stage that is temporarily parasitic on fish, nacreous shells, high in organic matter, that may crack upon drying out, and siphons too short to permit the animal to live deeply buried in sediment.
