Aggressiveness Level is a classification that is used to measure how aggressive a creature is.
Harmless: It is not dangerous to humans.
Very Low: It is harmless if not disturbed.
Low: It will attempt to scare if threatened.
Medium: It could attack to hurt if threatened or confused. Will attack if attacked.
High: It will attack and even kill if threatened or confused.
Very High: It will attack to kill if something gets into its territory.
Extreme: It will kill for no apparent reason.