Hidden Rathound cave in the Black sea?

[Amannamedsquid]

Does anybody recall a hidden rathound cave somewhere in the black sea? I remember there being some nice-ish loot and around 3-5 Ancient Rathounds inside. I also remember that you need a perception check to find it. I've looked for it myself but I can't seem to find it again. I may just be getting hit hard by the Mandela effect.

TL;DR: Does it exist, or am I just derailed?

[PaposikG6]

You are derailed.

[Amannamedsquid]

Well, that explains a lot.

[harperfan7]

The siphoner pools dive cave can have ancient rats, thats probably what you're thinking.  Dunno if theres a per check in there.

[Fins]

If memory serves, it does. And i definitely remember fighting an ancient rathound - maybe even couple, not sure - there in one of playthroughs.

Thing is, it's probably random, if it is this one from the wiki: "Siphoner Pools (Black Sea) > Underwater rock bridge > 7 Perception > leads to a lingula plant and a random treasure "crevice""

P.S. Amannamedsquid, if this is the one, then your derangeness is optional. Sort of. Or, intermittent? Random? Episodic? Words are hard... Ah, no, this is the term: occasional. Now that's one rare state of mind, right?