Horror

Each times you hear this word, what do you think at first? Most people will think of ghosts of course. Those words are greatly related to each other thus making everyone including me to think of ghosts each times hearing this word. However, since I watched horror anime I've stopped thinking that way. In animes, they don't really make horror stories that are related to ghosts instead they make stories that give out a horror feeling, even though they are not ghosts stories. Once, I watched a short anime about fish that underwent a revolution which made the fish have legs. They suddenly came to land and spreaded viruses to humans as well as animals. In consequences, all the infected humans turned into some kind of zombies. They are not zombies actually just I ddon't know how to put it into words.