Any “unnatural” creature sets off this fear. You have -1 to -4 on the self-control roll if the monster seems very large or dangerous, or if there are a lot of them. Note that the definition of “monster” depends on experience. An American Indian would consider an elephant monstrous, while an African pygmy would not!
You are afraid of any large body of water. Ocean travel, or even air travel over the ocean, is basically impossible for you, and encounters with aquatic monsters are also upsetting.
