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
 * Mirelurk
 * Super Mutant
 * Super Mutant Behemoth

Animals

 * Bloatfly
 * Brahmin
 * Centaur
 * Deathclaw
 * Giant Ant
 * 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