ANyone know why there are hundreds of Jewel Danuo fishing holes in Vale around Mogu Palace
There is a "fishing hub" every day somewhere in Pandaria. What you saw was a Jewel Danio "fishing hub". They change every day and you can ask a Pandaren Fishing Trainer east of Halfhill (Valley of the Four Winds) where the today's hub is and what do you fish in it.
I. Like. To. Kill. Things.
Immerseus should totally have a phase where he AOE-pelts your raid with Jeweled Danio.
There's a guy in Halfhill who is fishing on the east side of the village, he will tell you where the big fishing pool thingy is for the day. Basically it's infinite pools in a specific area. And if you fish long enough a big elite appears like the Lurker Below.
They introduced it in 4.1 or something? Can't remember. While ago.
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I'd personally farm them whilst you can; especially if you're on a PvP server. Next patch they're found on Timeless Isle; trying to fish in peace with all the world PvP going on (not least given the incentive of the Mushan mount via Burning Brazier), i'd imagine they might be somewhat valuable.
"Can your blood atone for genocide, orc? Your Horde killed countless innocents with its rampage across Stormwind and Lordaeron. Do you really think you can just sweep all that away and cast aside your guilt so easily? No, your kind will never change, and I will never stop fighting you." - Grand Admiral Proudmoore