Just wanted to update the thread.....
Pair still doing their side by side dance.....at times very tight turns in center of tank, just off the bottom.
Male carresses her, as they swim side by side near the surface of the water....he falls slightly behind her, open his mouth and and rubs her just behind gill plate.
The bull frog sound still continues, usually at night, around 12-1am....but also during the day, but not as frequent....
The male is 4 years old, the female 2, both fish 23" in size.....the female really bulking up around the mid section.
cheers