Barnacles are filtering mollusks of the order Pedunculata. As these barnacles are developed in timber floating in the sea are believed that they came from a tree; the English painter John Gerard in 1597, he painted the " the ducks 34 tree; The similarity and the way Englishmen of the time believed that the mallards, geese, originating the barnacles of this species, whose scientific name is Lepas anatifera. They live in the rocks.
Neck Swan ( or 41 gooseneck barnacle;: a variety of barnacle whose tongue or neck is very long. In antiquity, it was believed that geese were born of these barnacles. The barnacle is a crustacean that attaches to rocks on the sea coasts. It is European location. In America, especially in Chile, has its equivalent called picoroco. They are highly valued as edible.