GREEK DEMIGODS Hercules Perseus Theseus HINDU DEMIGODS Madurai Veeran Karuppu Sami Hanuman ROMAN DEMIGODS Thor Magni Ragnarok here's three different types. didn't know which kind you wanted
Simple answer: mammals have fur, reptiles and fish have scales, and birds have feathers. All three are simple variants of maturation in skin cells: if the cells just get thick, then you get scales....