Movie S1

Confocal timelapse microscopy imaging of zebrafish embryo from 24-34hpf labelled with transgenic markers for all membranes in magenta Tg(actb2:memCherry2) (Xiong et al., 2014), and a pan-neuronal marker Tg(neurod:eGFP) (Obholzer et al., 2008) in green. Imaged from dorsal view. Only a single z-slice midway through the D-V axis from each z-stack is shown.