Slugs are former denizens of the Derfland Region in Final Fantasy XI. Known for their voracious appetites, they became infamous for the crippling damage they wreaked on the berry crops of the Rolanberry Fields, causing agricultural yields to plummet. Their highly viscous bodily fluids eluded successful analysis despite the best efforts of Jeuno's engineering elite, and it was not until the days after the war that a collaborative effort with the ingenious technicians of Windurst would bring about a complete eradication of these pests.
- Corrosive Ooze: AoE Water damage and Defense Down.
- Fuscous Ooze: Cone attack Water damage, Encumbrance, and Weight.
- Mucilaginous Ooze: AoE Slow and Encumbrance.
- Purulent Ooze: Cone attack Water damage, Bio, and Max HP Down.