That would depend on the dealer, i know in Asia distributors at one stage were picking out only females for sale and kept all males for breeding...I just want to make sure I can keep them before I buy 6 at $15 each.
How likely am I to get a male and female if I ordered 6 shrimp?
Now a days this doesnt tend to happen, but again depends on the dealer and if they are hand picking shrimp somehow, or just picking them out at random...