Green terror cichlids are known labeled as Andinoacara rivulatus but they previously were known as Aequidens rivulatus for quiet sometime. These South American cichlids are very brightly colored with fluorescent bright blue scales. There are other species in this genus which can be perceived to be Green terrors but their different but similarly looking cichlids. They include Andinoacara stalsbergi and Andinoacara sp. Gold/Silver saum. Some of the confusion is around the color of their fins along the dorsal and caudal. Some are colored white and others reddish orange color.
The beauty and natural aggressiveness of Andinoacara rivulatus makes them ideal for hobbyists who wish to add variety to their cichlid aquarium. There is a reason their called Green terrors! A. rivulatus can be kept with other big cichlids like A. ocellatus or Oscar cichlids, R. octofasciata known as Jack Dempsey cichlids, A. citrinellus the Midas cichlid sometimes called the Red Devil, T. meeki known as the Firemouth cichlid, P. managuense the Jaquar cichlid, and other similarly aggressive cichlids but not limited to cichlids. Example you can keep them with Arowana, or Datnoides. It’s just a matter of balancing the community with the right mix of fish.
As is standard with most large cichlids, the Green Terror is aggressive and requires a large aquarium or community tank. When young they can readily be kept in a community tank with other South American cichlids, but as they mature the will become pugnacious and should be separated into their own tank or into a tank with comparable sized cichlids that match their temperament. It’s not uncommon to give them at least 30 to 40 gallons of space just for themselves when kept as a single fish. As a pair they will benefit from 55 gallons or more.
South American Fish Peru Cichlid Green Terror 6-7 inch in 55 Gallons Tank Aquarium