Icelandic Sea Monster Museum hafmaður (merman) they are half men and half fish. they are half men and half fish. The Merman is said to be one of the ugliest beasts seen. It is over 2 meters tall as it stands on its hind legs. When it moves on shore, it drags its belly. The skin resembles a larvae skin as it is almost transparent. Its face is the worst part, round staring eyes and the mouth flashes a set of long saber like teeth. People have gone mad after looking at the face. It was last seen 150 years ago.