Hi Jim,
these are my first pair of wheelers. got them off of DD as a bonded pair with a candy cane pistol shrimp.
ive had them about 6 months now.
definitely a male and a female, as you can tell by size and color.
the female typically stays on the front left of the tank with the pistol shrimp. The male typically stays middle to right side of the tank.
They get together a couple times a day and stay side by side. and every few weeks they go thru their spawning ritual.
I call them Mr and Mrs Smith! They have pretty cool personalities and are very curious.
If you wanted a pair, I would definitely buy them as a pair after they have been sexed, like from DD.
Male
Female
Mr and Mrs Smith