ɪn nˈaɪntiːnhˈʌndɹɪd fˈɪfti sˈɪks, ðə zˈuː ˌɪntɹədˈuːst ɐ fˈiːmeɪl ɡɚɹˈɪlə nˈeɪmd fˈɪfi tə bˈoʊboʊz kˈeɪdʒ ɪnðə hˈoʊps ðæt ðeɪ wʊd mˈeɪt.
In 1956, the zoo introduced a female gorilla named Fifi to Bobo's cage in the hopes that they would mate.