A-C, Japanese rice fish, also known as medaka (Oryzias latipes). B, Wild-type female dissection, showing ovary (ov, dotted line). C,
Amhr2 Y390C/Y390C female, showing hypertrophic ovary (dotted line). D-F, Nile tilapia (Oreochromis niloticus). E, Histological section of testis from wild-type XY. F, Histological section of gonad, showing typical ovarian histology in amhy knockout XY. Image in A modified from www.seriouslyfish.com. Images B and C modified from Morinaga et al., 2007, copyright 2007 National Academy of Sciences. Image in D from Wikipedia. Image in E from El-Sayed et al., 2014. Image in F modified from Li et al., 2015.