Movie 3.

The path of the ventral arterial sprout follows a differing path from the pectoral fin enervating axons. A 3d-reconstruction of a confocal z-stack of a representative Tg(kdrl:egfp)^s843, Tg(elavl3:mCherry)^{nia02tg double} transgenic zebrafish at 46 hpf, showing the differing paths of the 3^rd and 4^th axons of the pectoral fin with the ventral arterial sprout shown in Fig. S3.