He is born from an embryo of special merman that was wiped off the planet due to George Bush's(the senior) secret extermination service. He is the last of his kind and upon seeing the young merman Bush Sr. saw the possibilities of using him in the Olympics. Thus he was placed in a laboratory and was field tested every day by the best scientists the U.S.A. can conduct. They erased his past (alas Eternal Sunshine to the Spotless Mind) and named him Micheal Phelps
the last merman, Micheal Phelps and ruler of the seas.