ðeɪ mˈeɪ ɹᵻkwˈaɪɚ spˈɛʃəl fˈuːd sˈʌtʃ ɐz stˈɜːlɪt stˈɪks, æz ðeɪ ɑːɹ ʌnˈeɪbəl tə daɪdʒˈɛst ðə vˈɛdʒɪɾəbəl pɹˈoʊtiːnz jˈuːʒuːəli fˈaʊnd ɪn kəmˈɜːʃəl fˈɪʃ fˈuːdz.
They may require special food such as sterlet sticks, as they are unable to digest the vegetable proteins usually found in commercial fish foods.