Just because a mob is listed on the Allakhazam front page as "New" doesn't mean it was just added to the game. It means the mob was just added to the ffxi.allakhazam.com database.
Also, this NPC sells Fish Mithkabobs for around 1k each. That's 12k per stack of kabobs. I'm no Paladin, but even if that is a savings, it can't be worth the flight to Kazham for.
The flight to Kazham is 200. Fish Miths sell for about 12k already on Shiva but sometimes you can't find them. Eel Kabobs +4 DEX are a worthy addition since personally as a THF I am sometimes stuck without DEX food unless I get the very pricey Squid Sushi +6 DEX which goes for around 16k. When I can't find Eel Kabobs I usually get Flint Caviar +4 DEX which sometimes sells for less.
That is still a good deal mind you, but it's nice to know you can go out of your way to get some if there aren't any in the AH at Jeuno.