Giving Even More Back to Nature

For scalebelly mackerel, this macro can be used to accept quest and hand in. Replace the 70199 in the second line with the quest ID for other fish types if the other fish are cheaper.

/targetexact khuri
/run C_GossipInfo.SelectAvailableQuest(70199)
/run CompleteQuest()
/run GetQuestReward()

It's also possible to bind:

-Interact with target to mouse wheel up
-the macro to mouse wheel down.

Then, spamming the mouse wheel will do all the actions repeatedly. It might be possible to automate this using out-of-game scripts but I wouldn't recommend it as that can be bannable.

For me turning in 20 fish gave me 10 fish credit for the achievement, so now after 10k turnin I got the quest :D
Hopefully it is an easy bug to fix. just be aware.

Can't believe nobody's mentioned that addons can do all the turning in for you.

1. Install the AutoTurnIn addon
2. Buy 10,000 of the cheapest fish (20 fish = 10 achievement progress)
3. Buy 20 of the second-cheapest fish*
4. Make sure all the fish are in your inventory or bank
5. Talk to [npc=194584]
6. AFK until the addon has turned in all the fish. Takes about nine minutes.

Or you can restock by doing daily quests.

*This prevents the dialog window from closing. Without a second type of fish, you'd need to re-open the dialog window for every turn in.