Claws, chitin and endless numbers: the Tyranids are the stuff of science-fiction nightmares. This guide answers one question: what are the Tyranids, and what is a hive fleet?
The short answer
The Tyranids are an alien super-organism from beyond the galaxy. Every creature in a swarm, from tiny Rippers to towering bio-titans, is part of one vast collective intelligence called the Hive Mind. They travel in living starships known as hive fleets, and they exist to consume all life, turning it into biomass to grow more Tyranids.
The Hive Mind and synapse
Individual Tyranids are not soldiers in the human sense. Lesser creatures act on instinct, while larger synapse creatures, such as Hive Tyrants and Tyranid Warriors, relay the will of the Hive Mind to everything around them. Kill the synapse creatures and the smaller organisms can revert to animal behaviour, which is why defenders target them first.
The Hive Mind's presence also casts a psychic "Shadow in the Warp" around a swarm. It drowns out the psychic messages the Imperium relies on, so worlds in a hive fleet's path often fall silent long before the first creature lands.
How a hive fleet devours a world
- Scouting and infiltration: vanguard organisms and hidden cults weaken a world from within.
- Invasion: spores rain down, releasing swarms that overwhelm the defenders.
- Consumption: everything organic is broken down and absorbed, sometimes even the atmosphere.
- Adaptation: the Hive Mind learns from each fight and breeds new organisms to counter the defences it met.
That last step is what makes them so frightening. Every battle, won or lost, teaches the swarm something.
The three famous hive fleets
A hive fleet is one great tendril of the Tyranid invasion. The Imperium names each one, and painters use their colours as the classic Tyranid schemes. The colours below follow the descriptions on Lexicanum; the base, shade and highlight notes are our own generic painting guide.
| Hive fleet | What happened | Carapace | Skin | Painting notes (base / shade / highlight) |
|---|---|---|---|---|
| Behemoth | The first hive fleet the Imperium met. It smashed into Ultramar and was finally destroyed at the Battle for Macragge (745 or 746.M41, depending on the source), at the cost of the entire Ultramarines 1st Company. | Blue | Red | Carapace: mid blue / dark blue wash / pale blue edges. Skin: deep red / dark red-brown wash / orange-red highlight. Weapon symbiotes are usually black. |
| Kraken | The second great invasion. It attacked several targets at once, devastated the Aeldari craftworld Iyanden, and splintered after being thrown back at Ichar IV and Iyanden. | Red | Bone | Carapace: red / dark red-brown wash / orange-red edges. Skin: bone / brown wash / off-white highlight. |
| Leviathan | The largest yet. It attacked from below the galactic plane in 997.M41, reached the Blood Angels' home world of Baal, and has since returned with new tendrils threatening the heart of the Imperium. | Purple | White | Carapace: purple / dark purple wash / lilac edges. Skin: off-white / soft purple-grey wash / pure white highlight. Weapon symbiotes are usually red. |
Lexicanum notes that the newer Leviathan tendrils shown in recent material use a slightly different shade, with purple tones over the white skin, so either version is "correct".
Inventing your own hive fleet
Countless smaller hive fleets and splinter fleets exist, so many players create their own. Two tips make a custom scheme work:
- Contrast carapace and skin. A dark carapace with pale skin (or the reverse) reads clearly at arm's length.
- Pick one spot colour. A single bright accent on claws, tongues or weapon symbiotes ties a big swarm together.
Because Tyranid armies can be large, fast methods matter. Our beginner Tyranid painting guide covers a quick approach, and the slapchop method is excellent for big broods.
Are Genestealer Cults Tyranids?
They are connected but play as a separate faction. Genestealers infect human worlds, creating hidden cults whose members unknowingly prepare the way for a hive fleet. When the fleet arrives, the cult is consumed along with everyone else.
Common beginner questions
Where do the Tyranids come from?
From beyond the galaxy. Nobody in the setting knows exactly where they began, which is part of what makes them so frightening.
Can the Tyranids be reasoned with?
No. The Hive Mind has no interest in negotiation; it sees every living thing as biomass to be consumed.
Do I have to paint my Tyranids as a named hive fleet?
Not at all. The galaxy is full of unnamed splinter fleets, so a custom scheme is completely in keeping with the background.
Quick summary
- Tyranids are one super-organism directed by the Hive Mind.
- Synapse creatures pass on the Hive Mind's will; the Shadow in the Warp cuts off psychic contact.
- Behemoth, Kraken and Leviathan are the three famous hive fleets, each with its own classic colours.
Independent resource published by Blubbercove Ltd. This page is not affiliated with, sponsored by, endorsed by, authorised by or licensed by Games Workshop Limited.
Warhammer 40,000 and the names of all associated armies, characters, races, vehicles, units and places are trademarks of Games Workshop Limited, used here without permission and solely to identify the subject. This is an unofficial fan guide.