Apistogramma borellii, commonly known as the Umbrella Cichlid or Borelli's Dwarf Cichlid, is one of the most distinctive and adaptable species in the Apistogramma genus. Native to the Paraguay River basin and adjacent systems in southern Brazil, Paraguay, and northern Argentina, it inhabits areas with relatively clear water and, notably, cooler temperatures than most of its Amazonian relatives — making it one of the most temperature-tolerant Apistogramma available.
Males are significantly larger and more colourful than females, displaying iridescent blue-green scales across the body, a yellow to golden head, and blue-edged fins. Several colour variants have been developed in captivity, including the popular "Opal" variety with enhanced blue colouration. Females are smaller and primarily yellow, developing intensified coloration when in breeding condition.
In the aquarium, A. borellii is regarded as one of the more beginner-friendly Apistogramma species — it accepts a wider range of water conditions, is less aggressive than many of its congeners, and adjusts relatively quickly to captive life. Like all Apistogramma, it is a cavity-spawner that uses caves, coconut shells, or dense plant root systems as breeding sites. Males may maintain a small harem of females in a suitably large and decorated tank.
