Organisms that are born female and later metamorphosize into males are protogynous hermaphrodites. Those that shift sexual morphology in the presence of a sexual partner are simultaneous hermaphrodites.
In a study in which a bluehead fish alpha female was spayed and the dominant male was removed from its tank, cohabitating females wanted to spawn with her as her phenotype changed.2
1Sapolsky, Robert. Human Behavioral Biology. Stanford Courseworks. Stanford University, Stanford, CA. Web. 7 Nov. 2011.
2Becker, Jill, S Breedlove, David Crews, and Margaret McCarthy. Behavioral Endocrinology. second edition. Cambridge: Massachusetts Institute of Technology, 2002. 243. Print.
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