As far as I can tell they are the same as cherrys only blue. They may be dyed this colour im afraid(I have read this on other forums). I'm pretty sure all my wild form cherrys came from one of these as a while back I only had one adult female cherry left and purchased 2 of these blue shrimp (males) from the lfs. One died a few days later and I decided that I just couldnt breed shrimp(still had a half dozen rainbows)and concentrated on breeding galaxy rasboras in that tank. One day I spotted a tiny grey shrimp scurrying along and before long there were loads. Some of mine do get a very dark grey/blue but not as blue as the ones you buy.