I’ve never really made much of a deal bout this but I’ve never been a fan of giving the galra animalistic (usually cat-like) traits such as bleping. To me, that kind of thing doesn’t really go along with how the show presents the galra. They’re not really meant to be space cats, but really, are meant to be space vampires.
The creators themselves compared the Galra Royal family to vampires, which makes sense. Zarkon is almost entirely driven to find Voltron since the beginning to use it to farm quintessence from the rift.
In a sense, it’s very similar to how vampires usually are depicted as entities entirely driven by the search for blood. Much in the same way vampires hunt down people to suck their blood, the galra will go great lengths to acquire quintessence and the resources to obtain quintessence. Hence all the mining colonies we see from the beginning in s1, where as pointed out in the show, the galra took without giving back to the point that the colonies nearly died (like the Balmera). Very much in the same way we’d see vampires suck their victims dry of the blood their victim need.
And we see this most importantly in the designs of the characters themselves. There’s a reason why there’s not really a uniform galra look in the same way all Alteans are space elves. Cause like vampires in history, the galra have a varied look. The only things that define galra are the jaundiced eyes, blue or purple skin (like a corpse), pointy carnivorous teeth, and long talons. All of which are found in vampires across many cultures.