Additional Supporting Information may be found in the online version of this article.

DVDY_21938_sm_SupplMovieS1.avi3433KSupp. Movie. 1. Time-lapse movie of a migrating primordium shortly after deposition of L1, in the Tg(h2afv:GFP) line. Time interval between frames: 30 sec, total length of the movie: 30 min.
DVDY_21938_sm_SupplMovieS2.avi5346KSupp. Movie. 2. Migration of a truncated primordium. 70% of the primordium cells were ablated 20 hr before the beginning of the movie. The truncated primordium has migrated over 14 somites during this period. It has deposited neuromast L2 and is depositing L3 at the beginning of the movie. The primordium comprises 35–40 cells, much less than normal. Time interval between frames: 1 min, total length of the movie: 2 hr 40 min.

Please note: Wiley Blackwell is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.