Fukaboshi is a shark merman and the eldest son of the royal Neptune Family on Fish-Man Island. Fukaboshi is an enormous, muscular shark merman, with a wide chest and large arms. He has a long face, framed by wavy fair blue hair flowing down to his shoulders, a sharp and pointy nose, and a dot of some sort printed on the middle of his forehead. He has gills on his massive neck and a dark blue tail with light blue polka-dots.