The Red Rainbow, also known as Salmon Red Rainbowfish, Red Irian Rainbowfish, and New Guinea Red Rainbowfish, exclusively inhabits Lake Sentani and its tributary streams in the northeastern region of West Papua New Guinea, near Jayapura city.
These vibrant fish prefer the lake's margins, rich in vegetation and bog-type wood, where the clear, swiftly flowing streams create an ideal environment. Feeding on insects and various plant matter, Red Rainbowfish thrives in the alkaline waters of both the lake and streams. Originating from a warm equatorial area, they are unsuitable for coldwater tanks.
Reaching lengths of up to 15cm in the wild and approximately 12cm in aquariums, Red Rainbowfish is characterized by its long, slender body. Mature males exhibit a highly arched back and narrow head, showcasing typical rainbow fish traits like large eyes, a deeply forked mouth, and two dorsal fins. In the right conditions, mature males display a brilliant blood-red body with silver scales, while females and young males are generally olive-brown with clear gray fins.
The intensity and shade of red in male displays are influenced by various factors, including age, health, mood, water quality, temperature, and rank in the school. Proper aquarium conditions, including filtration, water changes, a school of six or more fish, and a high-quality diet, enhance their activity, vibrant colors, and overall well-being.
As omnivores, Red Rainbowfish thrive on a diet rich in meat-based foods, bugs, and insects, along with plant matter. A varied diet, including live options like blackworms and brine shrimp, promotes good coloration. Specially prepared commercial foods labeled as 'super color food' with additives like carotene can also enhance their color.
Suitable for community aquariums or geographical tanks with other rainbowfish, Red Rainbowfish coexists well with similarly sized and good-natured tank mates. Although generally non-aggressive, they may display chasing behavior during male displays. Maintaining an appropriate ratio of males to females in schools is crucial to ensure peace among them.
 
Species: Glossolepis incisus
Common Name: Red Rainbow
Origin: The northeastern region of West Papua New Guinea
Diet: Omnivorous
pH Range: 6.5 – 8.5
Temperature: Tropical and Coldwater 21°C – 26°C
Breed Type: Egg Scatterer
Current Size: Approximately 4cm (Grows to approximately 12cm)
Sex: Un-sexed