
Choose type
Every fish passes through our dedicated quarantine system and strict biosecurity monitoring before sale - so it arrives healthy, settled and ready to thrive. How we quarantine →
| Tasmania | NO |
| Western Australia | NO |
| Northern Territory | NO |
| All Other States | YES |
Lengguru Rainbowfish are a beautiful and relatively uncommon rainbowfish from West Papua, Indonesia, prized for their shimmering body colours and active schooling behaviour. Mature males can develop impressive blue, turquoise, yellow and reddish tones, particularly when displaying.
They are peaceful, energetic fish that look their best when maintained in a group, where males will naturally display to females. Their active swimming style makes them an excellent choice for larger planted community aquariums.
Provide plenty of open swimming space alongside areas of vegetation and hardscape. A varied diet of quality flakes, small pellets and frozen or live foods will help maintain strong growth and colour.
Scientific Name: Melanotaenia sp. 'Lengguru'
Common Name: Lengguru Rainbowfish
Family: Melanotaeniidae
Type: Freshwater Fish / Rainbowfish
Adult Size: Approximately 8–10 cm
Temperament: Peaceful
Care Level: Easy to Intermediate
Minimum Aquarium: 100 L+
Temperature: Approximately 24–28°C
pH: Approximately 7.0–8.0
Diet: Omnivore
Tank Level: Midwater
Group Size: 6+ Recommended
Suitable For: Community and Planted Aquariums
Yes. They are generally peaceful community fish and can be kept with other similarly sized, non-aggressive species.
A group of 6 or more is recommended. Larger groups allow them to display more natural schooling and social behaviour.
They are omnivorous and readily accept quality flakes, micro pellets, frozen foods and live foods such as brine shrimp and daphnia.
Yes. They work particularly well in planted aquariums with dense vegetation around the edges and open swimming space through the centre.
Good water quality, a varied diet, appropriate lighting and keeping them in a social group will help encourage strong colouration. Mature males typically show the most impressive colours when displaying.
Keeping too few fish
Rainbowfish are social and generally thrive when maintained in a proper group.
Using an undersized aquarium
Their active swimming behaviour requires adequate space, particularly as they mature.
Filling the entire aquarium with dense plants
Provide open areas where the school can swim freely.
Feeding a monotonous diet
A varied diet helps support growth, health and vibrant colouration.
Keeping them with aggressive species
Aggressive tank mates can cause stress and suppress natural behaviour.
Livestock is dispatched with heat/cool packs and oxygen from our Melbourne facility, timed for the safest transit. Live arrivals may be scheduled for the best shipping window. A live arrival guarantee applies - contact us within the required window if anything is not right.
We stand behind everything we sell. If something is not right, get in touch and we will make it right. See our returns policy for the details.
This fish has been through our dedicated quarantine system and is feeding, settled and health-checked before sale. We still recommend acclimating slowly and quarantining new additions at home. Our team is happy to talk you through the right setup - just ask.