Originally Posted by damo2904
The best way to tell if it's a male is try putting a mirror in front of it, if it flares I would say you maybe looking at a male, females don't usually tend to be bothered with their reflection. Also are the ventral fins quite long?
I haven't directly confronted her with a mirror, but she flares at her heater (has a mirror-like texture). I don't know what to do about that.
Females are known to flare, though.
Here's a picture of her ventrals as well. They are along, but they are very slender. Most pictures of male that I see have very wide ventrals.