The Tyranid hive fleets are rapacious alien swarms that flow from beyond the galactic fringe to devour all life. From their chitinous blades and parasitic guns to the vast hive ships that ferry them across the stars, everything about the Tyranids is organic. Like an endless insect swarm, their individual warrior organisms are given unified purpose by the imperatives of a vast and ineffable alien consciousness known as the Hive Mind.