(firemouth cichlid), flowerhorns (no scientific designation), smaller P. managuense (jaquar cichlid) and P. dovii (wolf cichlid), and other similarly aggressive cichlids. Role in hormone research A. rivulatus has also been used as a model for the effects of testosterone on lateralization. See also List of freshwater aquarium fish species References General Green terror Freshwater fish of Ecuador Freshwater fish of Peru Fish described in 1860 Taxa named by Albert Günther