WOW: Fish Mountain Trout In Azshara

From what I've seen so far, this will only net you Mountain Trout, but anyway:
Schools of mountain trout actually spawn in Azshara, on the pools of the massive waterfall on the northern cliff face bordering Hyjal. It should be noted that you need some method of flying (fly hack, spirit gryphon, rocket helmet, etc.) to get up there.

Coords are in the bar in the top left corner of the screenshot if you need them.


As you can see, you can get several schools in a pool. The most I encountered was five at once on the pool fourth from the ground.