I recently adopted 2 beautiful female Betta fish! I also have one male. I noticed that the girls are a lot more active than the male.
As they swim around in their tanks, Mr.Rainbow whom I have had in my home since December 2017 either hides or sleeps but mostly sleeps. He also refuses to eat.
As I have been studying him, I noticed he is a lot bigger than the girls. Is he dying of old age?