endemic freshwater clam ohrid lake underwater photography dreissena

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Endemic freshwater clam in Ohrid lake, underwater photography - Dreissena sp. Royalty Free Stock Photo

Endemic freshwater clam in Ohrid lake, underwater photography - Dreissena sp.

Dreissena is a genus of small freshwater mussels in the family Dreissenidae in the class Bivalvia. They are found attached to firm substrates by threads from underneath the shells and are the only freshwater bivalves to attach to hard substrates in high densities while having a planktonic larval stage.