What Behavior Do I Look For In Mating Pairs?

[turtlemom]

I have two blue gouramis in a tank together both behaving quite well towards each other
and now there is agression from the female
she was paler than the male and now she is just as colorful

 

[fordtrannyman]

Do you have any pics?
There are lots of articles on the internet that explain the basics of Gourami Sapwning.
Initially, if the conditions are right ie; calm water surface, floating substrate.
The male will start building a bubble nest under that substrate. That will be the first sign.

 

[skater1293]

the male tends to get all excited and following the female
chasing, bumping, getting really close etc.

 

[Espyish]

That is usually a sign of a pair getting to know eachother. Otherwise, it could very well be aggression in two males. But, as long as they are not getting rough I woud say they are a pair. Pictures would be helpful.