From 1d4chan
What the Imperium thought the Galg looked like...
What they actually looked like.

The Galg (Adumminus sextus) are a race of weird cephalopods from the planet of Adummin. They are a race whose individuals which resemble a mass of tentacles with a bulbous head. They are also described as having six tentacle limbs instead of arms or legs and no head, but clusters of eye-like organs that "wave like grass in a breeze".

Young Galgs produce an oily secretion that is drunk by the Dark Eldar, giving an invigorating effect and occasional hallucinations.

When fighting in close quarters, Galgs have been known to latch onto an enemy's back and wrap their tentacles around the opponent's throat.

Unfortunately, due to bureaucratic fuck-up, the Galg were actually mischaracterized as a bunch of broad, barrel-chested frog-like humanoids in Warhammer 40,000. Having wide toothy mouths, and bulbous black eyes whilst producing psychotropic poison on their skin, much like some real-world toads. Liber Xenologis seem to have cleared up the misunderstanding as the initial description seem to depict a completely separate Xenos race instead.

The Galg are also a mercenary race, selling their services to the highest bidder, oftentimes finding themselves in the employ of the Tau.

Notable Species of Warhammer 40,000
Major: Eldar, including Dark Eldar Humans, including Abhumans Necrons Orks Tau Tyranids, including Genestealer Hybrids
Minor: Anthrazods Ambull Araklionid Barghesi Banelings Bale Childer Brachyura Drahendra Caradochians
Cimmeriac Cryptos Cythor Fiends Demiurg Donarathi Drugh Dracoliths Drax Enoulian
Enslavers Formosian Fra'al Galg G’nosh Greet Gykon Hrenian Hrud
Ji'atrix Jokaero Jorgall K'nib Kathaps Khrave Kinebrach Kroot L'Huraxi
Lacrymole Laer Lelith Loxatl Medusae Megarachnids Morralian Nagi Nekulli
Nicassar Old Ones Poctroon Q'Orl Rak'gol Rangda Ranghon Reek Reptos
Saharduin Saruthi Scythian Simulacra Slann Slaugth Sslyth Stryxis Tarellian
Thexian Thraxian Thyrrus Tushepta Umbra Ur-Ghul Vespid Watchers in the Dark Whisperers
Xenarch Yabi-Yabi Yu'Vath Zoats Viskeons