Lythrypnus dalli
KORY GOZJACK
Scientists at Georgia State University demonstrated that male gobies produce more androgen receptors than females. This increase is evident on a muscle that directs the movement of their dorsal and caudal fins, and could be important for driving courtship behaviors that are stereotypically male.
See E.R. Schuppe et al., “Sex differences in neuromuscular androgen receptor expression and sociosexual behavior in a sex changing fish,” PLOS ONE, doi:10.1371/journal.pone.
