bˌaɪoʊtˈoʊkəs ɪz ɐ fˈɪʃ dʒˈɛnəs ʌv sˈɪtʃlɪdz fɹʌm nˈɔːɹðɚn sˈaʊθ ɐmˈɛɹɪkə wˌɛɹ wˈʌn spˈiːsiːz bˈiː. dˈaɪsəntɹˌɑːɹtʃəs ɪz fˈaʊnd ɪnðɪ ˌɔːɹɪnˈoʊkoʊ bˈeɪsən ænd ðɪ ˈʌðɚ bˈiː. ˈɑːpɚkjʊlˈɑːɹɹɪs əkˈɜːz ɪnðə nˈɔːɹðɚn pˈɑːɹt ʌvðɪ ˈæmɐzˌɑːn bˈeɪsən.
Biotoecus is a fish genus of cichlids from northern South America where one species (B. dicentrarchus) is found in the Orinoco Basin and the other (B. opercularis) occurs in the northern part of the Amazon Basin.