The Boesemani Rainbowfish Melanotaenia boesemani are found in Asia, more specifically in the Vogelkop Peninsula of Western New Guinea (formerly Irian Jaya). They are found only in the waters and tributaries of Lakes Ayamaru, Hain, and Aitinjo. They inhabit swampy shallow areas that are densely vegetated and feed on small crustaceans, insects, and some vegetation. Other common names they are known by include Bicolor Rainbow fish and Boeseman’s Rainbowfish.
The Boeseman’s Rainbowfish are omnivores and are opportunistic feeders in the wild, with a natural diet of small crustaceans, insects, and some vegetation. In captivity, they should be given a high quality diet to encourage good colouration. A mix of live and processed foods is necessary for optimal health.
Buy processed foods in small amounts and frequently, as the nutritional value of these products quickly deteriorates past usefulness. Boesemani Rainbows relish live food like bloodworms and brine shrimp and the like. If these are unavailable, frozen (defrosted) substitutes would be fine.
Rainbowfish are not exceptionally difficult to care for provided their water is kept clean. At least 25 – 50% of the tank water should be replaced weekly, especially if the tank is densely stocked. They are very active swimmers so a tank at least 80cm long is necessary. They are also jumpers so be sure the tank has a secure cover.
The Boesemani Rainbows do fine in a larger fish community aquarium of similarly sized fish, but do exceptionally well in a geographical tank stocked with other rainbows. Although generally non-aggressive, overly aggressive or very shy tank mates will make bullies out of them. Mix them with other playful but good natured fish for best results. You may notice some chasing between rainbows, but this is rarely a concern unless a fish is injured, has nowhere to hide, or is constantly harassed (usually a result of one of the first two).
Boesemani Rainbows are schooling fish and the ratio of males to females is very important to keep a reasonable peace among them. Although you can always keep single sex schools, you will see significantly better colouration if both genders are in the tank.
- Species – Melanotaenia boesemani
- Common Name – Boesemani Rainbow
- Origin – Vogelkop Peninsula of Western New Guinea
- Diet – Omnivorous
- PH Range – 6.5 – 8
- Temperature – Tropical and Coldwater 21°c – 26°c
- Breed Type – Egg Scatterer
- Current Size – approximately 5cm (Grows to approximately 11.5cm)
- Sex – Un-sexed