Agreed, it should be apparent at that size what the sex is.
I notice that Jack Dempseys are overbred/inbred to the point where in local store fish, you see lots of specimens with fewer pearling and some with deformities.
Yeah I agree. Ingot it for $3 at a chain LFS. I'm pretty sure it's female because of the spangles around its bottom gills but the camera won't show it. I was really hoping for a show fish.