clam shells on sea sand

art jewellery blue circle bead purple organ pattern gemstone food invertebrate petal flower toy necklace violet hand crochet sand seashell saltwater clam marine bivalve mollusc snail common large storm janthina epitoniidae glycymeris cockleshell nummaria glycymerididae sandy coast mediterranean sea shellfish shell aquarium aquatic beach conch crustacean exotic fishstar life living mollusk natural nature nautilus ocean scallop seashore shore species spiral travel tropical vacation water sea-snail shells sandviolet