seashell outline set. of sea conch and mussel. hand drawn graphic clipart of shell. linear drawing

seashell vector set outline clipart sea shell conch beach linear graphic illustration black line art shellfish cockleshell mussel scallop sketch drawing clam monochrome clip summer barnacle water marine ocean tropical nature shape mollusk coast seashore oyster nautical draw contour doodle simple element underwater aquatic coloring silhouette symbol white