Venting/Sexing Geo's

[The Messmaker]

G'day all,
Could I please get some info on venting/sexing Geo's.
Is there a difference in the vents? I have tryied the google thing and the search thing here and If I have missed something, please let me know. I am looking at Tapajos particularly but are all geo's vents different male to female. Info would be great, Pics would be awesome.

Thanks for your time in advance
Cheers

 

[aquabee]

I have 8 geophagus tapajos red heads. Their vents look fairly different but I find it easier to vent them after they get to about 4" in size or more. I usually put two of em side by side who have different vents... The male is usually the one with a more narrow, triangular area below the anus. Once you identify that, you can compare all others to him.

 

[orinocensis1]

Male is O >
Females is O o


Sent from my iPhone using MonsterAquariaNetwork app

 

[The Messmaker]

Thanks for your help