Concerning the item dexcription: Pretty certain the "mission" refers to the Carp Feeder's mission of keeping the carp fed, while the "desire" mentioned actually references the wishes of the 2 Pot Nobles to become the next Great Colored Carp. In killing the Great Colored Carp, you have ended the Carp Feeder's immortal mission and fulfilled one of the Pot Noble's deepest desires. Hope that clears things up for people.

If you feed only True precious bite to carp you can take one scale from the feeder and another three on his dead body after completion of sidequest

So random that they would put the Carp corpse at the Guardian Ape location. Was there any clue given that would make you think to look there?

After I gave the Feeding Grounds attendant the Great White Whiskey he gave me a Divine Grass. Then I aggroed him, killing him giving me 4 scales. RIP.

Can't you give the whisker to whichever merchant to make them become a larger fish?

I just randomly, without knowing, got the "Great Colored Carp" achievement after buying the Valley Apparitions Memo from the merchant in the Dilapidated Temple, which told of there being some apparitions at the Guardian Ape's den. I went there wanting to fight some ghosts, not expecting to find the Great White Whiskers lmao.

God dammit I completely forgot about these and didn't get the achievement

Thus, shoelaces were invented

Why tho, crap reward, no use other then a achievement?

damn...I gave the guy this thing and then straight up murdered him for no reason.