Sexing help? Angels

You will only know when you directly see one lay an egg that it is a female. And just because the two are buddies doesn't mean that the other one is male. Two females have been known to go through the motions together.

The difference between the sexes in anglefish is usually kept internal and it is possible to look up their vent and tell. But that can be stressful on the fish, and takes knowledge I don't have to know what to look for.

Just keep an eye on them for possible aggression and see what you can learn by observation.

 

Nope that's all pulling at straws, angelfish are only outwardly sexually differentiated by their ovipositors, all other visual clues are individual variations that are shared by both sexes. You might have two angelfish paired that look different, but you could also obtain a pair with the visual differences swapped so that the "male" look is on the female.

 

I bred angels many years ago and the only way to tell is just before they lay eggs and the breeding tube comes out.
SnakeIce is correct. I have seen 2 females lay eggs together with no male (of course the eggs never hatched).

 

Depends on the quality of the parents, if they have their behaviors intact you will get free swimmers because the parents take care of any threats. If they were breed with no consideration for keeping behaviors intact in the line you are right they won't survive. But then neither would any of their offspring survive in the wild if that were the case.

Breeding quality Angelfish with good fecundity, not over aggressive, and proper parenting skills is work. If you can though it is rewarding and less stressful because the parents do their job and do it well.

 

It's possible they are both female, and so the eggs weren't fertilized. They will pick out any dead or unfertilized eggs, so that they don't rot and cause problems for the others. If they are both female, none of the eggs would have been fertilized.