baɪ ˈɔːɡəst, mˈeɪlz ɐtˈeɪn ɐ mˈæntəl lˈɛŋθ ʌv sˈɛvəntˌiːn.fˈaɪv sˌiːˈɛm ænd, ɪf ðeɪ ɹˈiːtʃ ðə fˈɑːloʊɪŋ ˈeɪpɹəl, twˈɛnti wˈʌn sˌiːˈɛm, kəmpˈɛɹd tə sˈɛvəntˌiːn sˌiːˈɛm ɪn fˈiːmeɪlz.
By August, males attain a mantle length of 17.5 cm and, if they reach the following April, 21 cm, compared to 17 cm in females.