Today, the third day, they went up to the surface. They look happy, with a fat tummy and swim together most of time. I am sure that one is female, the other is much darker, has blue spots on black stripe, and a little bit pink tummy too. So, I assume they both are females. The lfs
guy said he can't tell since they are too small. But these are the only two left. The store will have more fish in stock in several weeks.