Velero del viento

El flotador es un disco ovalado, plano y azul de hasta unos 10 cm de largo, coronado por una vela delgada, descrita por lo general como triangular, que lo cruza en diagonal; de su borde cuelgan tentáculos azules cortos.

The sail of Velella velella helps it drift at an angle to the wind and occurs in two opposite forms. According to the US National Park Service, left-handed forms are usually found in the Northern Hemisphere and right-handed forms in the Southern Hemisphere; this is a general pattern, not an absolute rule.