hello summer card banner. vetigastropoda sea snail. unique shells, molluscs. sketch cyan black contour on blue background.

aquaculture aquatic art background beach beautiful biology bivalvia blue calligraphy card composition conch creative design doodle drawing drawn exotic fossil gastropoda graphic green hand hello holiday illustration invitation life marine mollusk nature nautilus object ocean oceanic scallop sea seashell shell shells sketch snail snails souvenir spiral summer travel vector vetigastropoda vintage water white