mya arenaria - shells of a bivalve mollusk - an invader in the black sea

invasive species invader invasion invasia invasions animal animals aqua beach biological biology bivalve bivalves black sea coast conch ecology europe fauna flora gastropod gastropods hydroorganism invertebrate life marine marines mollusk monodacna colorata mya arenaria nature oceans saltwater seashell shell shellfish shells water world wild wildlife zoology