The Akral, savage swarm creatures whose "social structure" is analogous to ants... Monstrous, genocidal, twenty foot, killer, mutant, Spleen Ants with fangs that can shred iron...
As with Ants, there is considerable structural diversity between the different types in the Hive. Above are Soldiers, there are also Drones and the more than slightly colossal (and exceedingly ugly) egg-laying Queen Progenitor. By chance, I discovered a screenshot showing the forty foot high egg-layer was already on my Doctor Who thread amongst assorted piles of other things, so I've reused it below. All the types, including those not shown, will be in the Hak.
I would say the Akral, a savage hive species, were the equivalent of the Alien in Demoness Tales, but since the Aliens ARE in Demoness Tales I'll just... not bother.
With any luck, the next post should be to point at the Vault and shriek "Ooh, look, Spleens!"