Hydrophobes appear in The Colour of Magic. They are magically talented individuals who have an extreme phobia or hatred for water. They are raised as powerful wizards, and from birth they are raised on dehydrated water from the Great Nef desert. Their fear of water becomes so powerful it forms a repulsion field around the hyrdophobe that allows them to repulse any nearby fluid. This can be used as a method of transport over water as a group of these wizards can keep quite a large item floating above a body of liquid with ease. All die young as the can not cope with the loathing they feel for their own body fluids.