That's what I've heard...how possible is that for someone with no experience in that matter?You can't tell just by looking at them. You have to vent Angels.
That could be very hard buddy, it's not so frequent that this happens since he's sort of new in the tank, but any reason why you're asking for such a picture so I can check myself if it extends the fins?Can you get a better side shot with the fins fully extended
The only way to accurately determine their genders is when they spawn. The shape of the tip of the ovipositor and its position helps determine which is male and which is female.