Newly differentiating fli1 expressing angioblasts contribute to caudal fin vasculature. Maximum intensity projection of Tg(fli1:H2B-mCherry)uq37bh; Tg(fli1:LIFEACTEGFP)mu240Tg double transgenic fish labeling ECs (white) and their nuclei (red) in lateral views anterior to the left. Scale bar: 40 μm.