It's not extra work, just slower.
Why would you call it that when you don't know which Kayo it came from?
That was the first location I found when I was looking into where this 'kayo' is in Africa, but I found this 'Lac Kayo' which is in Congo, it is a large lake, and prime polypterid habitat.
Just another possibility, only the collectors know for sure where they came from. 'Kayo' doesn't even mean anything to me other than it works as a quick way to refer to the wild congicus brought in by Wes.
Joe had some from Wes and Toyin, he could tell you if he noticed any differences.