Sexing tetras

[Tom]

Can anyone tell me how to tell the difference between my male serpae tetras and female serpae tetras? As well as neon tetras?
Tom

 

[Patchspud]

Just googled and found this - hope it helps

http://en.wikipedia.org/wiki/Serpae_tetra

 

[Tom]

Thanks. It did clear some stuff up.
Tom