That was for the bestiary entry for Mutated Colicoid, which I did the little wall trick to get the companion to kill it for the entry. That's also what makes finding the species I'm missing, Colicoid, hard to find on Google because most of the posts turn up the above bestiary entry and not the species one.
From what I gathered, the species entry for Imperial, "Colicoid" on Balmorra is republic only and it's a bug that it shows up for Imperials.