Bad news for lumbersexuals with topknots and carefully sculpted dad bods - your days as the vanguard of men's style may be coming to an end.
The next big men's style trend has arrived: Merman hair.
The ocean-inspired hairstyle taking the world - and particularly Instagram (hashtag #merman) - by storm sees men colouring their coiffures vibrant shades of blue, green and purple.
Some men are even going the extra mile and dyeing their eyebrows and beards to match.
One of the leading lights of the merman movement seems to be former One Direction heartthrob Zayn Malik, who shocked fans with a bright green hue recently.