chamelea gallina, bivalve mollusk burrowing into the sand in the black sea

animal aquatic biological bivalve bivalvia black sea chamelea gallina conch ecological ecology environment europe fauna flora gastropod invertebrate marine mediterranean mollusca mollusk nature odessa bay organisms seaside shell shellfish shells underwater veneridae venus venusmusslor water world wild wildlife zoological zoology shot gastropods bivalves mussels mollusc invertebrates underwaters sand clam