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Painter's mussel (Unio pictorum) in the middle of a small tributary to old Danube. Danube Delta, Romania. It is called Painter's mussel because the shell was historically used as a conveniently sized and shaped receptacle for holding artist's paint.
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Painter's mussel (Unio pictorum) in the middle of a small tributary to old Danube. Danube Delta, Romania. It is called Painter's mussel because the shell was historically used as a conveniently sized and shaped receptacle for holding artist's paint.