Melanotaenia affinis

Description

Melanotaenia affinis, the North New Guinea rainbowfish, New Guinea rainbowfish, or red-finned rainbowfish, is a species of rainbowfish endemic to New Guinea (Western New Guinea and Papua New Guinea). It grows to 11.5 cm (4.5 in) standard length. Of the three known varieties, the so-called standard variety has the widest range. It is commonly found in the Markham, Ramu, and Sepik Rivers; their preferred habitat includes clear rainforest streams, swamps, pools, and lagoons abundant in vegetation and submerged logs.