Fallout 3 creatures

This is a list of all creatures known to appear in Fallout 3:

Humanoids

 * human
 * ghoul
 * feral ghoul
 * glowing ghoul
 * mirelurk king
 * super mutant
 * super mutant behemoth

Animals

 * bloatfly
 * brahmin
 * centaur
 * deathclaw
 * giant ant
 * mirelurk
 * molerat
 * radroach
 * radscorpion
 * yao guai

Robots
Robots are not exactly creatures, but can be as much of a threat to your character (if not more).
 * Eyebot
 * Mister Gutsy
 * Mister Handy
 * Protectron
 * Robobrain
 * Sentry Bot