Zhou Tian couldn't figure out what type of creature the living beings within the Ancient Ruins Space belonged to - they were distinct from Beastmen, Elves, Humans, and many others. When it comes to special life forms, to Zhou Tian, they seemed similar to creatures, and if he had to compare them to anything, they seemed incredibly similar to the fictional aliens represented in Earth movies.
He did not see any facehugger-like child aliens, all the creatures resembled adult aliens, and had he not known that he was in a different world, Zhou Tian would've mistaken the Ancient Ruins Space for a world of aliens.
Zhou Tian couldn't discern in which epoch of this world such strange creatures had emerged. Nevertheless, after seeing their appearance, Zhou Tian became more vigilant.