Melanotaenia arfakensis

Melanotaenia arfakensis - photo© Neil Armstrong

Allen, 1990
Arfak Rainbowfish

Species Summary
Melanotaenia arfakensis have a basic body colour that is mauve with silvery reflections. There is a bluish midlateral band, about one scale wide, and a narrow yellow-orange stripe between each horizontal scale row on the sides of the body. Fins are translucent with a bluish to mauve shading. The second dorsal fin has a sub-marginal band and narrow white margins. The caudal fin has black upper and lower margins. Males may reach a maximum size of 10 cm, but females are usually less than 8 cm. Males are more brightly coloured, larger, and deeper bodied than females.

Distribution & Habitat
Melanotaenia arfakensis were originally collected by Gerald Allen in 1989 from the Prafi River, about 20-30 kilometres west of Manokwari, West Papua. This area is bordered on the western side by the Arfak Mountains. The mountains are a water catchment area for several river systems. A rich diversity of animal and plant life, including tree kangaroos, bandicoots and cuscus, are found here. The Arfak area is important historically and scientifically for being the site of the first extensive zoological expedition to West Papua led by d'Albertis and Beccari in 1872-73.

Melanotaenia arfakensis is a stream dwelling rainbowfish mainly found around sub-surface vegetation, submerged logs, or branches in small tributary streams, but can also occur in swamps and lagoons. Their natural environment is subjected to seasonal variations.

Remarks
A number of live specimens were collected by Heiko Bleher in 1990 and are available to the international aquarium hobby.

Literature
Allen, G. R. (1990). Les poissons arc-en-ciel (Melanotaeniidae) de la Péninsule de Vogelkop, Irian Jaya, avec description de trois nouvelles espèces. Revue française d'Aquariologie 16(4): 101-112.