A distinctive and rare line bred form of the common Angel (Pterophyllum scalare), the Red Devil or Super Red Angel is a popular variant due to its vibrant deep red coloration. Like all angels, they do best in a large, tall, planted aquarium with plenty of cover. As a cichlid, they can be moderately aggressive towards one another (especially as adults) but generally do well in a large enough group, usually 5 or more. Most other non-cichlid tankmates will be left alone but they will hunt and eat very small fish or invertebrates. Angels are somewhat sensitive to water quality so care should be taken to avoid large fluctuations in water conditions and partial water changes should be performed regularly. 5cm.