They shouldn't be even close together..Basically, there's shrimp that needa brackish period, different temps, and their young are born larval, and need to develop (red cherry shrimp)..Then, there's the Neocardinia types that give birth to minitature's of themselves..(Crystal Red's)...check out planetinverts.com BTW, I'll start shipping this week, the PO just hasn't gotten us the right boxes...Gary