Territorial dwarf cichlid. Provide a tank of at least 50 cm for 1 male and several females. Dense vegetation, caches, roots and rocks. The male can take on the coloration of the female, so be wary when getting a harlem of these gorgeous little fish.
Apistogramma sp. "Steel Blue" has been sold under a lot of different names including "Blue Head", "Blue Steel", "Blaukopf", "Bali", "New Blue", "Blue Face" and are now most commonly sold as A. agassizii or A. borellii. Of course, it is neither of these well known species but since most of these fish are sold by stores with no specialized knowledge it is often an innocent naming mistake. However, the on-line forums are full of people looking for info on the weird looking agassizii or borellii they just picked up.