Dwarf cichlids is the term used for all members of the family Cichlidae when fully grown do not typically exceed 10cm or 3-4" inches in size. This includes South American species such as Apistogramma, Apistogrammoides, Nannacara, Mikrogeophagus and more.
Dwarf Cichlids are generally peaceful fish and can be kept with a wide range of species from small tetras to predatory cichlids like Oscars. They may eat very small fish, if they can fit them in their mouth, because they are omnivores, but will generally do fine in a community tank with medium-sized species.