In fact, sex change is a very common reproductive strategy in many fish. Some, like the wrasse tend to change from female to male whereas others, such as clownfish tend to change from male to ...

This story appears in the January 2010 issue of National Geographic magazine. When Andrew Stanton set out to make an animated children's movie set in the ocean and faithful to "the real rules of ...

Clownfish all begin life as male, but can all carry both female and male reproductive organs on board. In any given community, the female is the largest fish, the breeding male is the second ...