Early MMP migration in a Δsix1a;4a;Δsix1b;4b mutant embryo. High resolution time-lapse imaging of MMP-like cells in a six1b:lyn-GFP transgenic Δsix1a;4a;Δsix1b;4b mutant embryo. Although there is little to no cell migration, MMP-like cells extend and retract filopodia. Images are taken every 80 seconds from 30 to 32 hpf. This time-lapse is representative of embryos imaged (N=3). Scale bar is 100 μm.