Movie 5.

Cell death of Nm ionocytes is observed in 4 dpf dll4 mutants. Time-lapse of a dll4 mutant larva showing a pair of Nm ionocytes, labeled by dld:H2B-EGFP, that migrate into a neuromast and die shortly after differentiation. Scale bar = 10 μm. Gamma was changed in the dld:H2B-EGFP channel to allow for visualization of dim structures.