**Tyrannovenator viridispinus: A New Apex Predator from Mongolia** In 2024, a joint Mongolian–Japanese expedition led by Dr. Ayako Sato uncovered a remarkably preserved theropod specimen in the Nemegt Basin. Named *Tyrannovenator viridispinus*—“Green-Spined Tyrant Hunter”—this Late Cretaceous predator measured approximately 8 meters in length and bore a distinctive row of keratinous spines along its back and tail, likely used for display or intimidation. The fossil’s integument revealed preserved chromatophores, suggesting a complex pattern of blue, green, and red pigmentation, an unprecedented find in large carnivorous dinosaurs. Its robust jaw structure and clawed limbs indicate a powerful ambush hunter, while its coloration challenges assumptions about camouflage in apex predators. The discovery of *T. viridispinus* marks a significant leap in understanding theropod visual signaling and ecological dynamics in prehistoric Asia.