The hydralisk is noted as being one of the most fierce and sadistic of the zerg strains. In the past, they commonly reached 5.5 meters in length and could draw themselves up to over 2.4 meters in height, however, hydralisks have evolved to be much larger. Since hydralisks move relatively slowly over open terrain, it is common for them to burrow and await their prey to enter killing range before attacking, destroying their enemies in a deadly crossfire. Despite their relatively sluggish nature, hydralisks can even climb vertical surfaces.