Sounds more like a good example of evolutionary adaptability.
Reefer Madness!
(Note to Dasher...Fire Island is a very famous beach near NY City known for its homosexuals...Provincetown is the favorite summer getaway spot for Boston's homosexuals.)
As he described it he was hiking to many of "The Thousand Lakes" Region of Minnesota peeking up a particular specie of fish. Actually he was performing DNA analysis of a particular fish which his Prof suspected could "change their sex" should an overabundance of a particular gender was present. The DNA showed that certain "new lakes" had a fish population where a fish was caught by a bird in one lake and while flying to its nest dropped the fish, OOPS! The fish landed in another lake where there weas one other fish of its specie but alas both were boys. So...they drew cards and winner got to change sex!
This "Discovery" is nothing new.
This is not uncommon behavior in fish. At least clownfish. They can and do change sex.
And you thought NEMO was a harmless movie bwahahahahaha.......................... ;-)