Some interesting AH activity related to the new fish:
http://www.ffxiah.com/player.php?id=63314
Blowfish, rusty spear, and rusty kunai (katana) all appearing back-to-back on the AH. Could mean that the rusty items are, indeed, related to gutting fish.
http://www.ffxiah.com/player.php?id=327951
Confirms that all new fish are obtainable (rather than just existing in the .dats and being implemented later)
http://www.ffxiah.com/player.php?id=400955
Again, we see all the new fish, as well as the rusty weapons (and their "unrusty" equivalents) all appearing very closely to each other.
Basically I just looked at single blowfish that had been sold on the AH, scrolled through the servers, and picked out these people who had sold one to themselves. There was a fourth person on Gilgamesh I didn't include, as well as someone from Carbuncle.
Are the "unrusty" items going to be worth a lot? I don't know the jobs they're used on well enough to know whether it's worth putting the effort getting a lot of these rusty items to sell (assuming they are from gutted fish).
And yeah, my guess would be that they're fished in Abyssea. The Dried Squid bait is probably a drop off of one of the mobs/NMs/treasure caskets in the area, which can then be used to fish up a NM. All just a conjecture, though.
EDIT: http://www.ffxiah.com/item.php?id=16188 Rusty Shield, See comments
"Can turn them in to an NPC in La Theine Abyssea zone along with3 other rusty items that can be fished up in Abyssea lakes."
So maybe gutting has nothing to do with anything. It's beginning to sound like you can pull up the rusty items (katana, spear, scythe, and shield) just like you would a rusty subligar or leggings, and there just happen to be fish in there as well. So I wonder what the fish are used for.
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