a clam living in siberia viviparous luzhanka viviparus viviparus . clam giving birth for its progeny in under water

acetabulum algae animal arhitaenioglossa biology birth breed brown caviar clam closeup contectus crawl family focus freshwater gastropods generation giving lake luzhanka macro marsh mollusk natural nature posterity progeny reproduction river sand seed selective shell siberia snail spawn springtime suck sucker summer undersea underwater viviparidae viviparus water wildlife