Hive Fleet

A Hive Fleet is a swarm of Tyranid bio-ships that travel together. They roam through space, invading planets and consuming their biomass to reproduce.

Origin

Nobody knows where the Tyranids come from, but it's definitely outside of the galaxy. The first major waves of Tyranids came from the galactic east (Ultramar, the Tau Empire, etc.), but the latest invasions occurred in the galactic south. At first, they seemed to be occurring at random, as systems would just fall silent without anything happening to their neighbors, but then it became clear that Leviathan was attacking from below the galactic plane.

Organization

Most of the mass of a Hive Fleet is in its Hive Ships, massive biological factories that take in biomass from conquered planets and turn it into more Tyranids. Each one contains one or more Norn Queens, who sift through the biomass looking for interesting traits and genes that they can graft into their "children".

The Hive Ships are protected by various strains of cruisers and droneships. Razorfiend Krakens hunt enemy ships, while escort drones cluster around hive ships as a living protective screen.

The Hive Fleets are rounded out by a pair of ship classes that they use to identify targets and get there in a reasonable amount of time. They send Vanguard drones ahead of the fleet, loaded with Genestealers, Lictors, and other infiltrator organisms, to candidate systems. Infiltrators that find their way to planets with lots of biomass found cults or colonies whose psychic networks act as beacons in the Warp and attract the attention of the fleet that spawned them.

Once a destination is determined, the fleet has to get there before it starves to death. It does this by employing a ship called a "Narvhal" which somehow harnesses the target planet's gravity to bend space-time into a "corridor", which allow the fleet to travel to this planet at faster-than-light speeds (not as fast as a Warp-capable ship, but certainly faster than drifting at sublight). This bending has the fortunate side-effect of causing tectonic upheaval on the target planet, disrupting any defenses. Narvhals have delicate gravimetric senses which are easily overloaded by nearby planets and stars, so the corridor dissolves as the fleet approaches its destination, and the fleet makes its final approach at sublight speeds, spending years or even decades in real-space. The fleet may hibernate to cool down and evade detection, only waking up when they are too close to be stopped.

Tabletop

Games Workshop used to publish experimental rules for Genestealer cults and deep striking "Seedling Swarms", but from Fourth Edition onwards, Tyranids have been a strictly one-codex army. The only reason to choose one Hive Fleet over another is for the color scheme.

Famous Hive Fleets

The main three Hive Fleets are Behemoth, Kraken, and Leviathan, with smaller Hive Fleets descended from them.

See Also

• Tyranid Hive Fleet Creation Tables, a set of roll-tables for generating your own Hive Fleet.
  • Hive Fleet Nidhoggr, generated from those tables.