Boosman’s iris (Melanotaenia boesemani) – relatively recently appeared in the decorative aquarism, but has already managed to firmly settle in the hearts of lovers. Like all melanotenii, the fish is unpretentious, peaceful, active, but the main thing is very beautiful.
Habitat: Indonesia. It has a very limited distribution in nature, it is known only about the habitat in the three lakes, known as Ajamaru of the Irian Jaya peninsula and in the nearby lakes Hain and Aitinjo. The iris, tend to gather in the transparent shallow waters of lakes, where there is very dense aquatic vegetation.
The lakes are characterized by hard, alkaline water (pH 8.0–9.0), although fish are also found in some adjacent tributaries with chemical characteristics (pH 6.0–6.5).
Description: in form the body is ellipsoid, high and flattened. The fish have a very unusual form of fins.
Spinal consists of two parts: small and more elongated. The anal fin is symmetric to the elongated part of the dorsal.
The tail is forked, the head is narrow with large eyes.
Coloring males brighter and more expressive. The front part of the body is blue with a slight violet tinge, smoothly flowing into the blue color on the border with a bright orange color of the back half of the body.
Orange may become reddish or yellow-golden in some individuals. At the confluence of the colors of the males there are poorly visible dark stripes. Dorsal fins orange with greenish edging, ventral bluish, anal yellow with blue edging.
Females are not as spectacular and are completely painted in dark blue. But they have a better noticeable silver shine. Fish differ in shape of fins.
In males, the anterior part of the dorsal fin has a sharper shape, which is rounded in females.
In the absence of favorable conditions for the maintenance of fish grow dull and lose their attractiveness.
In an aquarium, males of Boesman iris can grow up to 11 cm, females – up to 8 cm.
Arrangement and parameters of the aquarium: The active view is desirable Aquarium 120 x 30 x 30 cm – from 110 liters.
Undemanding and easily adaptable to new conditions. Considering that the fish prefers to live in a flock of at least 6-8, preferably more, when its coloring and behavioral features are most pronounced, it is desirable to select a capacious elongated container.
From the plants fit small-leaved species, planted around the perimeter to leave free space for swimming. To prevent them from jumping out, you need to equip the aquarium.
Water parameters: 27-30 С, pH 7.0-8.0, dGH 10-20.
Active aeration with filtration, weekly changes of one-third of water and good lighting are required. Will be glad to weak current of water.
Boosman irises (Melanotaenia boesemani) they prefer a society of their own kind, but thanks to their peace-loving disposition, they get on well with commensurate or slightly larger fish: tetras, shark bal, danios, discus, gourami, battles and catfish. Shrimps as neighbors are also suitable, but only such large species as Asian and African filter feeders and Amano shrimps.
Small types of iris may be mistaken for food.
It can also be compatible with many species of African cichlids due to its alkaline water needs.
Nutrition: fish are omnivores and take live, frozen and dry food. Of the living, preference is given to Artemia, crank, coretra, daphnia and the pipe worker.
A varied diet strongly influences the brightness of the colors of Boesman’s iris and for its preservation it is necessary to make a diet of various feeds.
Reproduction: a lot of plants and synthetic scourer are placed in the spawning tank, the front glass is darkened, and overhead lighting is installed above the aquarium.
Water parameters in the spawning aquarium: 26-28 C, pH about 7.5, dH 6-7.
First, one or two females start up in the spawning farm, and a few hours later, two or three males. Feed the producers should live daphnia, Cyclops, Artemia.
fry M. boesmani – first day and 4 (ate artemia)
The female is able to sweep about 50 eggs daily. On average, the spawning process lasts a week.
After it is finished, the adult fish settle out, and constant aeration is ensured in the aquarium.
fry M. boesmani – 1 and 2 weeks
The larvae hatch in 7-12 days, depending on the temperature and are immediately able to swim and take rotifers and ciliates of the slipper, after a week or so they switch to the nauplii of Artemia. Feed the young need often, but in small portions.
10% of the water is replaced several times a day. Sinking feed is unsuitable, as a rule, the fry are very close to the water surface.
fry M. boesmani – 3 and 4 weeks
In the general aquarium fry can be released when they reach a length of 3-4 cm.
teenagers M. boesmani – 5 and 8 months
Mature fish become reaching 8-10 months.
When creating favorable conditions, the Bozman iris (Melanotaenia boesemani) lives in an aquarium for 6-8 years.
note: Virtually all of these fish are sold from fisheries in Asia and Eastern Europe. M. boesmani is actually quite rare in nature and is on the IUCN Red List as a threatened species.
If you want to buy such iris, do not look for fish with bright colors, as in the photos! Adult specimens are rarely found and are expensive, usually for sale still poorly painted adolescents of these fish.
However, some patience (even on a good diet, full-color development can take more than 12 months), and you will be rewarded with the fact that it is undoubtedly one of the most impressive tropical freshwater species available in aquarium.