School of Fish
This NPC can be found in
Dustwallow Marsh (28), Eversong Woods (16), Durotar (10), Ashenvale (10), Desolace (9), Maraudon (8), Darkshore (8), Valley of the Four Winds (7), Stonetalon Mountains (7), Echo Isles (3), Mount Hyjal (3), Southern Barrens (2), Northern Barrens.