Thanksgiving Scavenger Hunt Clue 6 Hint

IT'S BGM TIME!
https://www.youtube.com/watch?v=4tqneKfiKvo&feature=youtu.be
Find the map in which this song is played, find the local merchant and buy the 2nd item for sale.
Then...
In the abyss these tasty fledglings wade.
It's in a paradise map in which light does not fade.
Some deep frying could do well to boost the flavor, but not stopping to eat will be in your favor.

Hint: Kingu has probably taken swimming lessons here before.
Cost of Hint: +10 minutes added to finish time, no looting needed