your fish is stressed for sure and your temp is to hot, bump it down to 75 degrees make sure he has hiding places to feel safe and try and get some bog wood it will help soften the water. South American cichlids come from softer water than that of African Cichlids
The green terror (Andinoacara rivulatus) is a colorful freshwater fish in the cichlid family. The fish originate on the Pacific side of South America in the coastal waters from the Tumbes River in Peru to the Esmeraldas River in Ecuador. Males reach lengths of 30 cm (12 in.) and females can, too. However, females stop growing the first time that they spawn and will remain at that length for the rest of their life. Females are sexually mature at around 4.5 in., and therefore that is the smallest length that they can remain at. This causes a misconception that males are larger than females.
As the name implies this species can be very aggressive, especially adult specimens. This is not guaranteed, however, and peaceful individuals are often observed. Juvenile green terrors are often sold in pet shops for the aquarium hobby, as well as fish similar enough to be mistaken for this species (including the blue acara, Andinoacara pulcher).
The fish is somewhat deep-bodied with a prominent head. Adult males develop a pronounced forehead hump, a common cichlid trait. Juveniles are tan colored with silver-blue flecks and lack the bright iridescent blue, green, and orange coloration and long, flowing fins of adult specimens.
Green terrors natively live in a tropical climate and prefer water with a 6.58.0 pH, a water hardness of 25.0 dGH
