Tyranids are a fictional alien race from the Warhammer 40,000 universe, known for their hive-minded nature and relentless pursuit of biomass. They travel through space in massive bio-ships, consuming all organic life to fuel their ever-growing swarms. Each Tyranid organism is genetically engineered for specific roles, such as warriors, workers, or monstrous creatures. The Tyranids are characterized by their adaptability and evolution, allowing them to develop new traits in response to different environments and threats. Their primary goal is to assimilate and dominate, making them one of the most formidable foes in the Warhammer 40,000 lore.