Twenty bivalves species from 18 genera (Anadara Gray 1847, Arca Linnaeus 1758, Glycymeris da Costa 1778, Crassostrea Sacco 1897, Ostrea Linnaeus 1758, Mytilus Linnaeus 1758, Mimachlamys Iredale, 1929, Flexopecten Sacco, 1897, Chamelea Mörch 1853, Polititapes Chiamenti, 1900, Cerastoderma Poli 1795, Venericardia Lamarck 1801, Loripes Poli 1791, Spisula Gray 1837, Atactodea Dall 1895, Solen Linnaeus 1758, Gastrana Schumacher, 1817, Donax Linnaeus, 1758) are presented. The shells were collected from Black Sea, Adriatic Sea, Aegean Sea, Dardanelles, Ionian Sea, Sea of Marmara, and Indian Ocean (Maldives).