I was able to loot a Koalindl Fish (the item required for the quest) last night from the koalindl in the center of the pool after two kills. In a patch five or six months ago, it was stated that the fish drop rate was decreased and it is certainly noticeable. Never ever have gone thru Frostbite to do this quest, so I dunno what to tell you about his drop rates. At the end of the following thread, kanras stated that the flying koalindl at the edge of the pool will return to normal in the next patch, and since the last patch was near the end of February, we just gotta be patient I guess.
http://www.project1999.org/forums/sh...ad.php?t=41863