I bought it from Gage as 100% vented male... but I was doing a water change right now and decided to drop it in with the big festae female to see what happened since "he" is so aggressive... and its pelvic fins turned black... 
This is a female Umbee right?
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What size did u buy it at? How big now? Don't hold ur breath yet, its not showing signs of either sex atm. Try get pic of side shot
I think it's a female......pretty much like Jason said it's not a sure thing at that size. Let us know what it turns out to be, let me know if my guess is right.
Lol I meant another side shot. The dark pelvic fins isn't always a give away, just like the dark dorsal fin for festae. I had a male that I swore was female because of dark pelvic fins and it showed a yellow base color when I had it divided with a pair. It turned out to be male tho. Yeah unless u can vent it, you might be waiting until its 6" before it starts showing true colors
My male was in a tank with (what I thought) 6 females. Waiting for him to choose his mate. All of them showed the dark fins (other than the for sure male). After he chose his mate I removed the other 5. Two of them turned out to be male, and didnt show signs, color or finage until I removed them from the dominant male. They both were around 6 inches. So, yours may still be a male, and if Gage vented it as a male I would trust him. He has been 100% successful with me so far. And I have purchased a lot of fish from him.