ðɪs ɪz vˈɛɹi vˈɛɹɪəbəl ænd ɪz pɹˈɑːbəbli lˈɪŋkt tə ðɪ ˈænjuːəl ɹᵻpɹədˈʌkʃən sˈaɪkəl ðæt ɪz tˈɪpɪkəl fɔːɹ mˈɛni sˈɛfɐləpˌɑːdz.
This is very variable and is probably linked to the annual reproduction cycle that is typical for many cephalopods.