Promises of Gold

Killing [npc=62767], a 16mil HP elite Clam underwater @ 27.4-16.2, Dread Wastes (northwest corner of the zone) will grant you this quest. Rikkitun Chanters will then bring the clam pearl to their village where you can turn the quest in.

As of build 15913, the fight is still easy to solo but boring as hell, the elite clam absolutely does nothing but standing still. Adds come to aid it from time to time, and that's all. The whole fight is underwater but you've been granted [spell=129678], so you won't need to swim up at all.

It's a clam. "Standing perfectly still" is kind of their thing...

You get this quest automatically after killing [npc=62767], a very large clam in the northwest seas of Dread Wastes. His coords are 27,16. The reward is [item=88417], a fun item that spawns an open clamshell that you dance on.

Killing Gokk'lok isn't very difficult, it just takes a long time because of his massive 16.3 million health pool. He doesn't do any actual attacks, he just sits there. The only trouble is that he spawns adds every so often. They seem to come at every 10% interval of his health.

Here are the mobs in order:

4 Spindlegrin Hatchlings
1 Spindlegrin Remora
1 Elder Spindlegrin (elite)
5 Brinyfin Darters
2 Brinyfin Trumpeters
1 Brinyfin Partriarch (elite)
6 Seacarp
3 Overgrown Seacarp
1 Colossal Seacarp (elite)

The trumpeters are probably the worst of the bunch. Once you kill Gokk'lok he will eject the pearl and it's then dragged to shore by a bunch of Rikkitun Chanters. They start running up the hill with it and you meet them at Chief Rikkitun (38,17) to turn in the quest.

As a level 90 shadow priest with questing gear (ilvl 434) killing Gokk'lok took me 24 minutes. You don't have to worry about drowning because being in the vicinity of Gokk'lok grants you underwater breathing from the automatic Enchanted Essence buff. I stood as close as possible to him to avoid aggroing mobs swimming by. I would recommend getting buffs from the Klaxxi to help you (here's an explanation of those). I used the Angel of Death Klaxxi Enhancement from Kil'ruk the Wind-Reaver and the Painkiller Klaxxi Augmentation from Korven the Prime. Some of the enhancements/augmentations may not be available to you, depending on how much of the Klaxxi questline you have completed.

A note to Mac users: If you die, when you get back to your corpse you won't be able reach it without diving. Remember to hold down the command button, click, and pull back with two fingers to drop into the water.