This species has been recorded a few times off Morocco and once off Mauritania; it may be extremely rare or mistaken for G. melastomus in the region. Its total range has been estimated to encompass , about evenly divided between the northeastern Atlantic and the western Mediterranean.
This species has been observed in a few places off the coast of Morocco and Mauritania, but it may be extremely rare or mistaken for G. melastomus in the region. It's total range is thought to be roughly split between the northeastern Atlantic and the western Mediterranean.