Means unusual creatures of the environment in general, that humans or animals is unknown. Monster was mentioned in legends or tales of the past, but then other people.
Refer to the wrong state organisms from the environment by human animals in General, or is unknown. Monster mentioned in legends or tales of various people, but the past.
The unwonted means organisms from the environment, or animals to the human beings are not known strange animals are mentioned in the story or legend of the people, but from past.