The lips, together with tentacles, and with minute spines on the fin rays, enable the fish to grip solid surfaces, so they can hold on in fast-moving streams.
ðə lˈɪps, təɡˌɛðɚ wɪð tˈɛntəkəlz, ænd wɪð mˈɪnɪt spˈaɪnz ɔnðə fˈɪn ɹˈeɪz, ɛnˈeɪbəl ðə fˈɪʃ tə ɡɹˈɪp sˈɑːlɪd sˈɜːfɪsᵻz, sˌoʊ ðeɪ kæn hˈoʊld ˌɔn ɪn fˈæstmˈuːvɪŋ stɹˈiːmz.