Symphysodon discus
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Symphysodon discus, the red discus or Heckel discus, is a species of cichlid endemic to the Amazon Basin of Brazil, where found in the lower Rio Negro, upper Uatumã, Nhamundá, Trombetas and Abacaxis.<ref name=Amado2011>Template:Cite journal</ref>
This species is essentially restricted to blackwater habitats with a high temperature of Template:Convert and low pH of 4.2–5.2.<ref name=Bleher2007>Template:Cite journal</ref>
This species grows to a length of Template:Convert SL.<ref name=fishbase>Template:FishBase</ref>
This species can also be found in the aquarium trade.<ref name=fishbase/>
Parental care
Small fry of this fish feed on the mucus secreted by their parents.<ref name=Hildemann1959>Template:Cite journal</ref>