seamless pattern sea shells rare endangered species, cardiidae bivalve molluscs gastropoda corculum cardissa or the heart cockle

corculum cardissa cardiidae heart doodle sketch sea shell vector illustration background nature ocean life marine aquatic starfish design graphic beach summer beautiful art drawn drawing travel symbol natural vintage object vacation seashell nautilus composition decoration element backdrop animal creative exotic spiral biology museum collection conch souvenir scallop mollusk tropical shellfish seafood oceanic aquaculture gastropoda bivalvia isolated on white hand seamless pattern wallpaper