Enemies are officially divided into broad categories known as Types. Most monster Types have correlation with other Types. Families of monsters within one Type are able to intimidate monsters from the Type that they are strong against. For example, Beasts are the natural predators of Lizards and will be able to intimidate them. Variations of monsters within each family are known as Species, which are typically differentiated by slight differences in their appearance or the special abilities they use.
Being the first MMORPG in the series, Final Fantasy XI has the most number of enemies in game. However, given that many enemies are identical with the exception of different stats or naming based on the areas they are found in, this gallery will list only the primary species of each family found within each type. Although it is rare, certain enemies may belong to more than one Type classification.
The actual list of enemies are broken down by monster type, and variations of species are documented on individual monster family pages.
Beasts - Lizards - Vermin - Plantoids - Aquans - Amorphs - Birds - Undead - Arcana - Dragon - Demon - Luminians - Luminions - Elementals - Empty - Archaia - Vorageans - Beastmen - Unclassified - Final Bosses