Heard female have slightly bigger belly while males look more skinny and have bigger lower jaw to hold the eggs
if the fish is about 6-7 years old and not obese, it's easy to tell by that way cuz the female have eggs.I have a silver and I don't know sex yet. I read that the females body would be more wide than average male. They said wider when looking at it from side not talking about girth. But I still don't know for sure.
My male use to make a loud vibrating humming noise, I have herd only males do this but I am not sure is that is true , maybe somebody else knows?
A male aro will have a clear overbite or bigger bottom lip than a female .
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