A visual guide to sexing new world cichlids

josh1986

Jack Dempsey
MFK Member
Jul 23, 2015
148
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Hey 2 new gt I have just got. What u think I'm thinking the smaller one is male with the longer fins in the top pic? IMG_20171103_062125.jpg IMG_20171103_062157.jpg
 

wfex4

Plecostomus
MFK Member
Oct 22, 2008
238
71
61
Cape Coral, Fl
Here is a depiction of male and female Geophagus pellegrini. As you can see the male is very colorful with pointed fins. The dominant male in the tank has darker red coloration and a slightly larger nuchal hump which can grow very pronounced with age and presence of other males. The females in comparison are rather drab and do not have pointed fins.

I should also add that this variant comes from the Rio Atrato. There are also collections from the Rio San Juan which seem to have less red and the lips may lack the blue seen in those collected from the Rio Atrato. Once mine grow out, I can add my observations from them.

Dominant male
3EC99A47-330D-422E-BED0-90415DAF2AEB.jpeg

Subdominant male
1656F594-E8E0-46A2-A117-05809306D859.jpeg

Female holding eggs in her buccal cavity
47B06569-5E3B-41AD-A8DA-E1D4794FFF23.jpeg
 

Beardogg85

Plecostomus
MFK Member
Feb 17, 2018
167
164
51
Was wondering if u had any pictures or info like this for the Black belt, Vieja Maculicauda. Would love to learn more thanks for this post. Have bee researching them would love to learn more
 
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Serpentine

Piranha
MFK Member
May 17, 2018
373
458
77
Relatively clear photo of venting a female Oscar. Note the oO shape of the anus and genital opening. With males they are the same size and both small with an oo shape.

2018-09-18_19.56.32.jpg
 

EccelaEkaj

Jack Dempsey
MFK Member
Nov 19, 2016
358
96
36
Make or Female Salvini? All beat up right now was in a tank with two other salvinis which looked grayer than this one ? I’m pretty sure it’s a female but want input from others to make sure.

5134E113-BE0F-4991-BEB8-B6D6DE9941E8.jpeg
 
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