Sexing Geophagus

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Michael Day

Candiru
MFK Member
May 12, 2011
134
80
46
Auckland, New Zealand
Hi All,
I have 6 Geos that were sold to me as Surinamensis but from what I have heard and read that is unlikely what they really are. Anyway, as far as I have been able to determine from Google is that they are almost impossible to sex. But one thing I have noticed is my most dominant fish's dorsal fin comes up to a definite point at the rear and all the others have quite rounded dorsal fins. Does this mean it is a Male and the rest are female?
 
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