Just curious Cecil, how you are going to sex RES outside of the spawn?
I am still trying to determine the sex the 5 RES I have in my aquarium. Based on the red/orange margins on the ear tab I think I have four males and one female. Based on the light creamy colored sides vs. much darker sides I think I have one male and four females.
My best guess is that I have one dominant male RES, three submissive males, and one female. Coloration wise the three submissive males look female with the exception of the larger red margin on the ear tab. The dominant male has both the darker sides and larger red margin on the ear tab.
