The problem is that there are many similar Tropheops species, and they have been confused with each other for years, the scientific names unsure, often sold as hybrids unknowingly. So the information is vague, and Tropheops have been considered pretty much the same, true or not.
As for popular, Mbuna that are common are usually because the juveniles are attractive and sell easily. These are dimorphic, if the juveniles and females are colorful they should be more common, but they are not as bright as Yellow labs, etc.
As for aggression, I don't know why lately they have been said to be super aggressive. Tropheops always seemed like typical old Pseudotropheus, average territorial, yes they can be aggressive like most mbuna but not psycho like Melanochromis.
As for popular, Mbuna that are common are usually because the juveniles are attractive and sell easily. These are dimorphic, if the juveniles and females are colorful they should be more common, but they are not as bright as Yellow labs, etc.
As for aggression, I don't know why lately they have been said to be super aggressive. Tropheops always seemed like typical old Pseudotropheus, average territorial, yes they can be aggressive like most mbuna but not psycho like Melanochromis.
