Microphotographs (10 × magnifications) of histological slides for five gonadal maturity stages in female yellowfin snapper, Lutjanus xanthopinnis, from eastern South China Sea(Malaysia). (I) Immature phase (stage I). (II) Developing/regenerating phase (stage II); (III) Spawning capable phase. (IV) Actively spawning phase (stage IV). (V) Regressing phase (stage V). Abbreviations: PG = primary growth of oocytes; PVO = primary vitellogenic oocytes; SVO = secondary vitellogenic oocytes; TVO = tertiary vitellogenic oocytes; HO = hydrated oocytes; AO = atretic oocyte; POF = post-ovulatory follicle.