Looks nothing like a nanoluteus....Looks more like your brothers "yellow fire mouths"..lol Looks like a yellow sajica....Nanoluteus look like yellow cons.....
lol the fish in question is very small still. i agree they do look like yellow cons. my pic looks almost just like his fish, but considering that i cannot really see the structure of the mouth area, i guess i cannot be certain either. becasue cons and nanos have different looking mouths.
These are bad shots but you can see when they are babies they do not look like your fish....Looks more like a fire con then a nano....Shape is not right...