A type of species found in a few Zone of The Seven Realms, some regions more, other regions not at all. They are several sub species of hellcats too.
Hellcats are mobs who will always stay at the same spot. When you are 5 levels higher or lower, they will not attack you anymore.
They have 2 large teeth sticking out of their mouth and 2 large horns on top of their head.
A summary of all the Hellcat in the game: Category:Hellcat.