Not sure why they even appear in the fishing log in the first place, or how the rest still bite after you've completed the relevant quest at the Facet in Crystalline Mean. I feel they should just remove them entirely from the log. It just doesn't make sense that this is the only one missing since before the 5.1 launch, and cannot be caught anymore like the others can. Plus, it was at one point in my log, or at least should've been, since I caught one HQ needed for the quest.