P. scalare

P. scalare

Pterophyllum scalare, the species most commonly referred to as angelfish or freshwater angelfish,^[8] is the most common species of Pterophyllum held in captivity. Its natural habitat Amazon River basin in Peru, Colombia,

Pterophyllum leopoldi

and Brazil, particularly the Ucayali, Solimões and Amazon rivers, as well as the rivers of Amapá in Brazil, the Oyapock River in French Guiana and the Essequibo River in Guyana.^[9] It is found in swamps or flooded grounds where vegetation is dense and the water is either clear or silty.^[9] Its native water conditions range from a pH of 6.0 to 8.0, a water hardness range of 5 - 13 dH, and water temperature ranging from 24 to 30 °C (75 to 86 °F).^[9] It was originally described as Zeus scalaris in 1823, and has also been described be several different names, including Platax scalaris, Plataxoides dumerilii, Pterophillum eimekei, Pterophyllum dumerilii, and Pterophyllum eimekei.^[10]