ðˌoʊ lˈækɪŋ fˈɪnz ˈʌðɚ ðɐn ɪts lˈoʊbd tˈeɪl, ɪɾ ɪz θˈɔːt tə hɐvbɪn ɐ ɡˈʊd swˈɪmɚ θˈæŋks tə stˈɪf, wˈɪŋlˈaɪk pɹətɹˈuːʒənz dᵻɹˈaɪvd fɹʌmðɪ ˈɑːɹmɚd plˈeɪts ˌoʊvɚɹ ɪts ɡˈɪlz.
Though lacking fins other than its lobed tail, it is thought to have been a good swimmer thanks to stiff, wing-like protrusions derived from the armoured plates over its gills.