how do u tell the sex of a black phantom tetra?

Question

i want to breed them

Answer 1

The female has some red coloration on it's pectoral and anal fins. The male is a smoky glass gray with black fins and a larger dorsal fin.

Answer 2

Tetra Sex

Answer 3

Well, I just looked at my sexed pair of Phantoms, and the female has a lot more red on her pectoral and anal fins. The male has a much taller dorsal fin, but most important is that the female will have a much wider and whiter stomach (the white of the stomach ends right before the anal fin begins)(because she is carrying eggs). To breed them, follow the instructions in this article. This is applicable to most small Tetras including Phantoms... http://fishlesscycling.com/articles/breeding_characins.html

Soop Nazi

Answer 4

I think it has something to do with their tails.