All the blue rams I've owned were very easy to sex. The females have a very obvious pink "blush" on their bellies. I can't really tell from the picture, but in person it should be pretty easy for you to tell.
forum community dedicated to tropical fish owners and enthusiasts. Come join the discussion about species,breeding, health, behavior, aquariums, adopting, care, classifieds, and more! Open to fish, plants and reptiles living in freshwater or saltwater environments.