The Hydralisk Den bears only a passing resemblance to the nests of the once-peaceful Slothien that the Hydralisks were evolved from. The slime-covered walls of this vile place contain within them the knowledge necessary for a Hive cluster to produce Hydralisk warriors.

• Muscular Augments. Hydralisks can be genetically altered for increased musculature such that their rate of locomotion is greatly enhanced.

• Grooved Spines. This subtle variation in the needle spines of the Hydralisk allows for an increased attack range.