Fig. 2
From: First reference on reproductive biology of Butis koilomatodon in Mekong Delta, Vietnam
Histology of ovaries of Butis koilomatodon (a, b, c, and d labelled for histology of ovarian stages I, II, III, and IV, respectively). Ovarian sections show oogonia (O), germ cell (GC), primary oocyte (PO), primary vitellogenic oocytes (PVO), secondary vitellogenic oocytes (SVO), post vitellogenic oocytes (PsVO), hydrated oocytes (HMO). Scale bar: 50 μm for histology