Heads up, thought it is NOT listed, this is where you find Dravanian Smelts.
You will need to use Brute Leeches to fish for them. The bad news, Brute Leeches attract Blueclaw Shrimp and Shadowhiskers. Be prepared to bring a lot of Brute Leeches.
I also suggest you use the HQ Crafted Lv 60 Gatherer gear and a Lv 60 HQ Birch Fishing Rod. Gathering Materias help immensely.
Be aware when using Patience, that both the Blueclaw Shrimp and the Dravanian Smelts are Precision Hookset fish. The Dravanian Smelt will tug harder than the Blueclaw Shrimp, but lighter than the Shadowhisker. I suggest you don't use Patience until you get a feel of the tugs the three fish give, to maximize your Patience HQ output for your Red Scrips.