Taildas ( テールダス, Terudasu) is a monster that appeared in the series Ultraman Comos in episodes 37 and 43. It became Chaos Taildas (カオステールダス Kaosu Terudasu?) when possessed by Chaos Header and Taildas-Mechalator (テールダス・メカレーター Terudasu-Mekareta?) when remodeled by Alien Nowar. Subtitle: Underground Monster (地底怪獣, Chitei kaijū)