You know there are going to be Beasts — it's right there in the Title . which beasts [or Creatures. if we want to use the more polite term] should we expect in Fantastic Beasts and Where. the Find Them ?
One time in Care of Magical Creatures, Hagrid was talking about mermaids. He made the mistake of saying the words “under the sea” to describe where most of them live. The muggleborns all burst into song, and would not stop singing for the rest of the day.