seashells seamless pattern. sea shell summer ocean texture. nautical starfish repeating vintage sketch background

aquatic artistic backdrop background cockleshell conch cone design drawing drawn endless exotic freehand graphic hand illustration life marine mollusk monochrome nature nautical ocean oceanic outline pattern repeating repetition scallop sea seamless seashell shell shellfish sketch sketched spiral star starfish summer texture tropical uncolored underwater vector vintage wallpaper white wildlife wrapping