The tag implication #66776 predalien -> xenomorph has been approved.

Reason: Predaliens (a xenomorph born from a predator / yautja host) are definitionally xenomorphs and they look it, so it's a pretty obvious implication to have, I think.

EDIT: The tag implication predalien -> xenomorph (forum #441173) has been approved by @spe.

are they actual xenomorphs(a alternate_form) through or a hybrid species in the same manner as real life hybrid species such as the liger or mule, nether of these get tagged with a parent's species on e621.

They are actual xenomorphs. To describe them as hybrids would be like describing normal xenomorphs as human hybrids; they're born through parasitism and kill the host. They are xenomorphs with genetic traits of predators, not proper hybrids.

Fictional hybrids are also tagged with both parents here anyways.

The tag implication predalien -> xenomorph (forum #441173) has been approved by @spe.