I don't think anyone will be able to. The fish with the more solid and full black markings are a bit more likely to be males (I see one smaller guy that has very full black fins), but that's not 100% by any stretch. And you have at least one female, right? (I assume those fry are from this tank).jprime84 said:http://www.youtube.com/watch?v=-cDgMRfAYjM
If anyone feels solid about visually sexing the 3 smaller ones, go for it.