Sex differences in the anatomy and physiology of the vertebrate preoptic area (POA) arise
during development, and influence sex-specific reproductive functions later in life. Relative
to masculinization, mechanisms for feminization of the POA are not well understood. The
purpose of this study was to induce sex change from male to female in the anemonefish
Amphiprion ocellaris, and track the timing of changes in POA cytoarchitecture, composition
of the gonads and circulating sex steroid levels. Reproductive males were paired together …