Sex my firemouths

  • We are currently upgrading MFK. thanks! -neo
Venting is the only real way to sex firemouths.

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A lot depends on the quality of the fish in question.

Its hard to sex FMs at a small size visually... I have had success sexing fish by watching their behavours though... The males are usually more dominant and flare more whereas the females tend to be quieter and submissive. As they get older though the sex's become much more apparent with the Males becoming larger and heavier in the head with larger mouths and longer fin tips. The females tend to be stouter and less colorful.

Looking at your 3 fish I'd guess the top photo could be of a male with other two being females
 
Cyberman said:
A lot depends on the quality of the fish in question.

Its hard to sex FMs at a small size visually... I have had success sexing fish by watching their behavours though... The males are usually more dominant and flare more whereas the females tend to be quieter and submissive. As they get older though the sex's become much more apparent with the Males becoming larger and heavier in the head with larger mouths and longer fin tips. The females tend to be stouter and less colorful.

Looking at your 3 fish I'd guess the top photo could be of a male with other two being females
Click to expand...

The other two could be sub-dominant males too.


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Cyberman said:
A lot depends on the quality of the fish in question.

Its hard to sex FMs at a small size visually... I have had success sexing fish by watching their behavours though... The males are usually more dominant and flare more whereas the females tend to be quieter and submissive. As they get older though the sex's become much more apparent with the Males becoming larger and heavier in the head with larger mouths and longer fin tips. The females tend to be stouter and less colorful.

Looking at your 3 fish I'd guess the top photo could be of a male with other two being females
Click to expand...

Thats not true I had a female that looked exactly like each other t
I thought they were both males until I vented them . She was as or more aggresive then he was and she would often be the dominant one in the pair. Venting is the best way to sex them cause from the picture it looks one male and two females . Especially since no two male or females firemouths look the same or have the same features.

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Well done... Which one was the male, in the end?
 
doomiedee said:
Thats not true I had a female that looked exactly like each other t
I thought they were both males until I vented them . She was as or more aggresive then he was and she would often be the dominant one in the pair. Venting is the best way to sex them cause from the picture it looks one male and two females . Especially since no two male or females firemouths look the same or have the same features.

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Click to expand...

It depends how good you are at recognising the features, combined.... yes you get females with more color... yes you get females with long extentions... but the lead features are the body shapes.. Males always have heavier heads as they mature and larger mouths. I'm not saying its a foregone conclusion cause you do get stunted specimens or substandard Firemouths, but based on quality FMs my defination of the sexes is accurate.
 
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