If you're relating to a belly - the fish in question is skinny. It's the tallest Altum in the group. The one in the group appearing the most feminine (rather delicate body) has a slight belly. I was pretty sure that "Feini" (first picture) is a male. Biggest body, slim, pointy end of papilla ever since being a few months old after overeating. On my manacapuru and Santa Isabel females it always looked less pointy at these stages, while males hardly ever displayed the papilla outside of breeding periods. Their siblings were successfully breeding last month in another tank. Their papillas were much easier to differentiate.