How to kill the Great Colored Carp in Sekiro: Shadows Die Twice.
-We will need to get to the Feeding Grounds Idol in Fountainhead Palace by following the path shown in the video.
-Here we can ring the bell to feed the Giant Carp, if we feed him regular Precious Bait, the NPC next to us will give us Treasure Carp Scales.
-If we feed him the Truly Precious Bait he will swim away (and die).
-We can find his body at Guardian Ape's Watering Hole - Sunken Valley, grab the whiskers from the ground for the trophy.
-If we return to the merchant at Hirata Estate we can grab a Lapis Lazuli (Upgrade Material).
-If we give in the Whiskers to the NPC at the Feeding Grounds he will give us a Divine Grass.