Table 2.

Characteristic of gonadal development stages for male and female

Stage	Male	Female
Stage I (Immature)	Testes are very small with grey color	Ovaries are small and transparent with yellowish-orange color
Stage II (Resting)	Testes become white, like ribbon	Oocytes in ovaries are still invisible in gonad ovarian wall
Stage III (Developing)	Testes are white and settle approximately half-length of body cavity	Ovaries are larger than stage II and oocytes are visible in gonad ovarian wall
Stage IV (Maturing)	No milt appears and testes occupy more than half-length of body cavity	The ovaries are larger than stage III, creamy orange in color; large oocytes are present in ovarian wall
Stage V (Mature)	Milt appears and 1/3 gonads fill to ventral cavity of testes	Ovaries are massive, yellowish color and occupy approximately 1/2 to 2/3 of body cavity
Stage VI (Spawning)	Milt excludes from testes firm strain to abdominal part	The extensive capillaries of ovary are clearly visible in ovarian wall
Stage VII (Spent)	Testes are smaller than stage V and VI with frail testes not fully empty	Ovaries are smaller than stage V and VI but flaccid and reddish color; some massive oocytes still appear in ovarian wall
Stage VIII (Recovering)	Testes are placid and small with reddish and brown color	Ovaries are small, flaccid and red-dark in color