I'm pretty sure it is a female. Walked past the tank and notice it has claimed one corner chasing all other fish away, which is random behaviour as it's normally pretty placid, and I'm pretty sure that's an egg tube sticking out?HiSaltyPlum ,
I agree withDeadeye and
FuriousFish . Your GT definetly looks male. He has a very steep forehead with a nuchal hump. He also has a pretty prominate blue "beard" also. He's a big ole chunky dude too. Your GT looks great.



Your Andinoacara Rivulatus is a female. Males display a reticulated pattern in the dorsal and anal finHi, for a while I thought my gold saum GT was a female, but now I'm not so sure. Interested to get members thoughts?
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The breeding tube speaks volume. So to reiterate so far,
The blue bearding increases chance for a female rivulatus (not all females have this), the lack of reticulated pattern in the dorsal, tail, and anal fin points to a female, and the nubby breeding tube points to a female rivulatus.
So, intense body coloring and hump don't necessarily point to a male because this female is showing dominance over the other fish..