(C-G'') Lateral images of the cranial vessels in lyve1b:Kaede transgenic embryos with the CCV photoconverted at 36 hpf (C) and followed through to 48 hpf (D) and 60 hpf (E), while in a separate larva the PHS has been photoconverted at 36 hpf (F) and followed to 48 hpf (G). Unconverted vessels are shown in green (C-G), while photoconverted vessels are shown in red (C'-G'). The extent of lymphangioblast contribution from each source is further clarified by false colouring the overlap between red and green fluorescence (purple), with the FLS demarcated (dotted line) from the adjacent primary veins (C''-G''). 