Warhammer 40,000: Tyranids - Termagants

Termagants are scuttling predators that attack in huge swarms, armed with living weapons that spit flesh-eating organisms and venomous spines. Originally spawned to roam the tight arterial passages of hive ships and hunt intruders, Termagants harry their prey with a hail of firepower, seeking always to outflank and envelop their victims as they erode their numbers.