The young generally undergo metamorphosis from larva with gills to an adult air-breathing form with lungs.
ðə jˈʌŋ dʒˈɛnɚɹəli ˌʌndɚɡˈoʊ mˌɛɾəmˈoːɹfəsˌɪs fɹʌm lˈɑːɹvə wɪð ɡˈɪlz tʊ ɐn ɐdˈʌlt ˈɛɹbɹˈiːðɪŋ fˈɔːɹm wɪð lˈʌŋz.