Lepadomorpha

a superfamily of invertebrates of the order Cirripedia (barnacles). The body is covered with calcareous plates and attaches itself by a fleshy stalk to the substrate. The body of Lepadomorpha measures up to 5–6 cm; the stalk is usually of the same length but may be as long as 75 cm. There are about 320 species. Lepadomorpha of the genus Lepas live not only on the sea floor but also attach themselves to floating objects and ship bottoms; they are distributed mainly in warm waters. Those of the genus Scalpellum live mainly in deep water and have been found at depths of 7 km.