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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.[1] 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.[2]
| Melanotaenia affinis | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Atheriniformes |
| Family: | Melanotaeniidae |
| Genus: | Melanotaenia |
| Species: | M. affinis |
| Binomial name | |
| Melanotaenia affinis (M. C. W. Weber, 1907) | |
| Synonyms[1] | |
|
Rhombatractus affinis Weber, 1907 | |
The New Guinea rainbowfish is a peaceful and adaptable rainbowfish species that grows to 14 cm. It favors a pH of 7.0, hard water: (100–150 mg/L) and a temperature of 21–28 C (70 to 82 F). It will eat small live foods and prepared diets. Just like related species, it should be kept in shoals.
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