Just a quick one you have more knowledge on them than me ... why does the black line come and go is it something to do with the mood of the fishHe’s looking like a beast in the making!
That’s what it seems like to me, when my male is getting aggressive at the front of the tank biting the glass his black line seems to disappear .Just a quick one you have more knowledge on them than me ... why does the black line come and go is it something to do with the mood of the fish