So if you saw some yellow shrimp there, they were not YKK, but most likely some sort of Yellow Neo... common names include Neon Yellow, Goldenback Yellow and 24K Yellow.
I thought they were the yellow neos the first day they were there and completely mislabeled and misspriced(WTF $9.99!). The 2nd day however, the girl that regularly works there that I make custom orders with because she places the orders relabeled them as Bee shrimp for $3.99. I do still think they're neos, but she's labeled them Bee, so that could only be YKK if she's correct. And I've definitely seen snow white bees there before.