The real apistogramma's come from southern America, they all have the same characteristics, like a complex breeding behavior, as their large relatives, only their size is different.
This article deals with a well-known floating plant that can be used in an unorthodoxly and highly ornamental way. Takashi Amano from Japan invented the technique of securing the aquatic liverwort Riccia fluitans to a piece of lava rock or slate and thereby keeping it submerged.