Fig. 2.

Sex determination and differentiation in fish. a The processes of sex determination, sex differentiation, and sex change are represented along the timeline of development. Sex change only occurs in sequential (a.k.a. consecutive) hermaphrodites. b The three major components of fish sex determination are indicated below. Genotypic sex determination (GSD) is driven by major and/or minor sex factors and environmental sex determination (ESD) is driven by environmental differences. The diagram also indicates above three common sex determination mechanisms