Mamook Pears- like... from MAMOOK?

[Charmin]

Limsa certainly has more extensive ports and vessels that go further afield, at any rate, which probably makes travel to and from Mamook easier from Limsa.

I think that we see further evidence of the MJ being transplanted by doing a bit of BTN:

Sagolii Sage: A savory herb often found growing in parched desert environments. It is used in cooking and various medicinal ointments and unguents.
Black Scorpion: A deadly desert vilekin from whose venom can be extracted a potent paralyzing poison.

The ONLY place you get these two desert-themed items is in the not-desert-themed Bronze Lake area, which is also apparently where the MJ (mostly) live. So perhaps they brought some things with them that took root in the swampy area? What's very interesting though is that even beyond the lizardy link of the MJs are that there are two other ingredients you can only find in the Bronze Lake area that don't have a native home there: