Could you developmental biologists help me? When injecting cancer cells into the perivitelline space of zebrafish embryo (48 hpf) and growing them 3 days (+34 degrees), what structure/location of the adult fish is that location most resembling for?
I believe its cardinal vein. Maybe try to refer to "The Vascular Anatomy of the Developing Zebrafish: An Atlas of Embryonic and Early Larval Development" (2001, first author Sumio Isogai) for more information?
You could try to label a bunch of zebrafish fry in that spot with DiI or a similar stain, dissect them at 3-4 weeks and see what is fluorescing.