界： 動物界 Animalia
門： 脊索動物門 Chordata
綱： 輻鰭魚綱 Actinopterygii
目： 鱸形目 Perciformes
亞目： 隆頭魚亞目 Labroidei
科： 慈鯛科 Cichlidae
屬： 珠母麗魚屬 Geophagus
Geophagus：從希臘 的地緣，意為“地球”，和 phagos，意思是“吃”。
最大長度200 - 250毫米。
水族箱:尺寸180 * 60 厘米
溫度： 26 - 30℃
PH值： 4.5 - 7.5
硬度： 18 - 179 PPM
First collected in 1991 by German aquarists Christop Seidel and Rainer Harnoss (Steinhaus, 2010) from the rio Tapajós, eastern Brazil.
A second form which differs slightly in head colour and morphology later appeared in the trade as G. sp. ‘orange head Araguaia’, referring to the major tributary of the rio Tocantins.
The rio Xingú lies between the Tapajós and Tocantins so this led to speculation that there should exist an ‘orange head’ form in that drainage, too.
However it’s now known for certain is that there exists no ‘orange head’ Geophagus species in the Araguaia or Xingú – it is in fact highly endemic and confined to the lower Tapajós.
The ‘orange head Araguaia’ form mostly inhabits the main river channel while the more intensely-coloured variant occurs in the rio Arapiuns.
The latter tributary empties into the Tapajós close to its mouth, on the opposite bank to the city of Santarém and a little downstream of the Alter Do Chão lagoon which is the primary collection point for the aquarium trade.
Males are more intensely-coloured than females, tend to be a little larger and develop longer fin extensions. Some dominant individuals develop a nuchal hump as they mature.
