Size from @ 3" to 5" The largest Rio Mag is looking a bit yellow in a few of the pics, possible female? This didn't start till the Magnum X which is also just under 5" was added although none of the fish have shown signs of pairing up yet.
Rio Mag and Magnum X Umbee Growouts
- Thread starter MarineMike
- Start date
yeah the female is the yellow one.
Males will color up and dominant with shine and spangles
Females do yellow highlighting.
in tiny Umbees, which ever one got the biggest tail inproportion to the body and most spangles in the fins (especially the tail) got highest chance of being male imo
Males will color up and dominant with shine and spangles
Females do yellow highlighting.
in tiny Umbees, which ever one got the biggest tail inproportion to the body and most spangles in the fins (especially the tail) got highest chance of being male imo
^^^ solid info here. And yes the largest is female. You won't see signs of pairing untill a male proves more dominant or out grows her. Which could take awhile since she is larger and will most likely dominate the tank for now which will affect the others growth rates. I suggest dividing her in same tank as the others till they get larger
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Updated pics. First three are Magnum X, the rest are the largest Rio Mag and smaller siblings. Both the large Rio mag and the Magnum X have grown 1.25" in less than a month the others are growing slower. She is still the dominant umbee in the tank. 
No idea, the Magnum X is most likely male. I guess time will tell on the rest.
I will in a few days. The Rio mags are the ones I got from you. What is their lineage and f# I don't remember.more pictures please
