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Sexing Rosy Tetras?


Gatito

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Hi guys, i've been looking on the net for how to sex rosy tetras, and i think it's going to be easy, but i need some clarification. The general advice is that the males are more colourful, with longer finnage, and are also smaller/more slender, while females are more rounded.

I have 10 rosies, and about half of them have white tips on their fins, and half have black fins. Is this white what is meant by 'more colourful'? Because the fins that are fully black seem to be longer than those with white.

Can someone help clear this up? I have pics of the rosies, and the difference in their fins, in my photobucket album (see link below)

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