HELP! my Flowerhorn is darkening and vibrates/shivers

[Beetlebug515]

Looks to me like it wants to breed with the other flowerhorn.

+1

 

[Ace Ringo Dakz]

UPDATE!!
There is a white stuff sprouting in the bottom of my FH. What is that? Is it an illness? Is it bulging anus? How to cure?

Or is it the FH breeding form?