Lanice conchilega (“Polychaeta”, Terebellida, Terebellidae), early aulophora larva I, length of tube 480 µm, Helgoland 07.2013. 1:24 min. The unique development of Lanice conchilega leads to an early larva, which settles for shortly at the bottom, then forming a tube and starting a second planktonic life as aulophora with 3 stages. The transparent tube, open at both ends, is often covered by mud and small particles. Video can be used for teaching.