Where are the most storm jellyfish?

. . . The people upstairs are really up to something. There is no such thing as storm jellyfish in WOW. Are you asking about the ones in "Pirate King"?

Monster name: Storm Jellyfish Level: 36

Map: Witch Coordinates: 1950, 3126

Items dropped: Smooth jellyfish skin, huge tentacles , colored glass, ruby ​​fragments, inner alchemy fragments