Red Rainbowfish
Glossolepis incisus
 
Overview
The Red Rainbowfish is one of the most striking rainbowfish species, famous for the intense red coloration displayed by mature males. Native to Lake Sentani in Papua, Indonesia, this active schooling fish thrives in well-maintained aquariums with plenty of swimming space. Their constant movement and shimmering colours make them a fantastic feature species for large community aquariums.
Males develop deeper bodies and brilliant red tones, while females remain more silver with subtle colour.
 
Care Sheet
Size
• 12–15 cm
Temperament
• Peaceful, active schooling fish
• Best kept in groups of 6+
Minimum Tank Size
• 200 L+
Water Parameters
• Temperature: 24–28°C
• pH: 6.5–7.5
• Hardness: Soft to moderately hard
Diet
• Quality flakes or pellets
• Frozen foods (brine shrimp, bloodworms, daphnia)
• Live foods occasionally
Tank Setup
• Long aquarium with open swimming space
• Planted areas around the edges
• Moderate water flow
• Tight-fitting lid recommended
Behaviour Notes
• Very active swimmers
• Males display to each other to show colour
• Ideal with other peaceful community fish
Breeding
• Egg scatterers
• Eggs laid among fine plants or spawning mops
• Eggs hatch in around 7–10 days depending on temperature