really looks like a Female yellow tail Acei to me. The females tend to be darker than the Males.

i have a big male Acei....they look nothing alike..and he would be courting her like crazy trying to breed with her but he doesnt sooo i dont think its a acei...

check out this link and make sure you look at all the pictures by changing them in the drop down bar under the picture shown..

wat link lee??

LOL.... the missing link ..

I thought the same thing at first Lee, but I have never seen an ace so dark, not even my males. My female acei is actually lighter than both my males.