Sexing my fruit tetras

Apr 24, 2017
1
0
1
#1
Before anyone says anything, I bought these fish before I knew what they were. I do not intend to get more but the ones I do have I'd like to know the gender of. I'm having trouble distinguishing them on my own. My fifth one died yesterday and I'd like to get a couple of black skirt tetras. Will my fruit tetras school with black skirts?
20170424_145226.jpg
20170424_145305.jpg
20170424_145235.jpg
20170424_145420.jpg