Thanks Reddit. Read this on there but it did get me thinking how did the Empire get hold of the Kelpiens in the mirror universe to use as slaves and food, or did the Terrans nuke the Ba'ul?
The Ba'ul had been in space for a few minutes, so while their technology looked impressively foreboding, their tech shouldn't be worth anything. I'm sure the Terrans just wiped the Ba'ul out.
What's great is Terrans have that famous cartoon were a Kelpian and Ba'ul go: "Ba'ul season!" "Kelpian season!"