The Boeseman’s Rainbowfish (Melanotaenia boesemani), also known as Boesemani Rainbowfish, is a small tropical fish known for its stunning coloration. It has a very limited range in Indonesia, and is only found in three lakes and their surrounding tributaries. It is believed that the aquarium trade has contributed to the decline of these fish in the wild, and they are currently listed as endangered on the IUCN Red List.
In the wild they primarily inhabit the shallow waters of lakes with dense vegetation. They can also be found in the streams and rivers that feed into the lakes, and the vast differences in water chemistry helps to contribute to this species ability to thrive in many different water types in the home aquarium.
Boesemani rainbowfish stay relatively small in the home aquarium, and a well cared male will usually top out at around 4 inches (10 cm) in length. Females are somewhat smaller, and will grow to just slightly over 3 inches (8 cm) in length. Most will only live between five to eight years in the home aquarium, though there are reports of some living as long as 12 years.