ðə pˌɑːpjʊlˈeɪʃən ɪnðə nˈɔːɹθiːstɚn ɐtlˈæntɪk spˈɛndz ðə wˈɪntɚɹ ɪn dˈiːpɚ wˈɔːɾɚz ˈɔf pˈoːɹtʃəɡəl, ðˈɛn mˈuːvz təwˈɔːɹdz ðə kˈoʊst ʌv fɹˈæns ɪn spɹˈɪŋ, bᵻfˌoːɹ mˈaɪɡɹeɪɾɪŋ fˈɑːɹðɚ nˈɔːɹθ ˌɪntʊ ðə nˈɔːɹθ sˈiː dˈʊɹɹɪŋ mˈeɪ ænd dʒˈuːn wˌɛɹ ðeɪ spˈɔːn ɪn dˈɛpθs ɹˈeɪndʒɪŋ fɹʌm twˈɛnti tʊ ˈeɪɾi ˈɛm. ɐ sˈaʊθwɚd maɪɡɹˈeɪʃən tˈeɪks plˈeɪs ɪn ˈɔːɾʌm.
The population in the northeastern Atlantic spends the winter in deeper waters off Portugal, then moves towards the coast of France in spring, before migrating farther north into the North Sea during May and June where they spawn in depths ranging from 20 to 80 m. A southward migration takes place in autumn.