Due to the enlarged suckers i would venture to say it a male......However I am not sure if it is a Vulgaris or not, the arms seem alittle too long.... Being that you are from Sweden, im going to guess this guy came from the Mediterranean, is that true? . IF it is a vulgaris it would be most likely be pretty young as Vulgaris grow to be fairly large, My best inaccurate guess since size is a terrible way to tell age, but i would guess between 3 and 5 months old.