| Common Silver Biddy | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Perciformes |
| Family: | Gerreidae |
| Genus: | Gerres |
| Species: | G. oyena |
| Binomial name | |
| Gerres oyena Forsskål, 1775 |
|
The Common silver biddy or Gerres oyena is a silver biddy fish found in the coastal waters of Southern Japan.[1] A species of bony fish belonging to the genus Gerres within the Gerreidae family.
Based on the seasonal reproductive cycle of the species, ovary development of the females occurs from March to September while the testes development of the males occurs between March an August. For both sexes, the maximal development occurs during April and May. Using the gonadosomatic index (GSI), the minimum standard length (SL) at sexual maturity was 89.7 mm for the females and 81.4 mm for males. The size at which 50% of individuals were sexually mature was 104 mm standard length in females and 92 mm standard length in males.[1]