part of start stage end stage gonad oogonia An undifferentiated germ cell that proliferates rapidly and gives rise to oocytes. In zebrafish oogonia are round cells, with centrally located nucleoli, which are strongly basophilic. Oogonia in larva zebrafish fish are often found in clusters of two or four cells, corresponding to the second, or third oogonial divisions, presumably arising from mitotic divisions of primordial germ cells. ZFA:0005878 Ceri 2016-12-14T12:05:24Z CL:0000024 zebrafish_anatomy germ line cell unknown adult