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Boraras Brigittae (Mosquito)

  • Scientific name: Boraras Brigittae
  • Common name: Mosquito Boraras, Rasbora Mosquito, Mosquito
  • Size of the aquarium: forty five litros
  • Temperament: Quiet
  • Temperature: Between 20 and 28 ° C
  • pH: Between oven there 7
  • Diet: omnivores
  • Length: 3 cms


The fish boraras brigittae, also known as Mosquito or Mosquito Boraras, It is a fish of the family ciprínidos. His name Boraras, It is an anagram of the generic name Rasbora, referring to the inverse proportion of abdominal and caudal vertebrae of this kind of fish. The name Boraras, He was chosen in 1993, with the intention of separating a small group of species most Rasbora, on the basis of some morphological differences and breeding. Thus, you may find references to this fish as Rasbora Brigittae and it is not really an error, even if outdated information. We are facing a fish sweet and warm water an extremely small size, very best for small aquariums.


As I mentioned in the previous section, we are dealing with small specimens, what not usually measure more than 3 a three,5 centimeters long. They are elongated and flattened laterally fish, a pretty slim profile. Pectoral fins of the boraras brigittae, They are completely transparent, while the dorsal fin has a stain on its front, surrounded by the same dominant coloration in fish, the scarlet, completely transparent to end. Other fins, anal and caudal, They are trimmed in scarlet coloration. anal, also it has a black border.


On its side They have a visible black stain, since the bottom of the fish is bright scarlet (bright red, between crimson and scarlet). This spot is greater, thicker and defined, at the height of the cappings, and ends merging into the caudal fin.

sexual dimorphism

No very obvious differences between male and female boraras brigittae , even if It is possible to distinguish females from males, because you are somewhat more rounded and slightly larger. males, usually they show a more intense coloration than females, and some red spots on the caudal fin, that they are not present in females.

Distribution and habitat

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The boraras brigittae, It is an endemic species of southwestern Borneo, where you can find streams of the so-called sewage, ponds, pools or swamps, Peat funds, caused by the oldest forests. They are places with little current. The waters they inhabit, They have a lot of organic matter, full of leaves and branches from the forest. that way, the water in which they often live in a free state, It is quite soft and acidic, low light, due to the large amount of surrounding vegetation.

Aquarium conditions

We're talking about really small fish, what They are perfectly in an aquarium 40 a forty five litros, which they will have sufficient space to swim. The water must be stored at a temperature between 20 and 28ºC, con a pH between oven y 7, 3rd and 8th hardness GH. A perfect recreation of habitat Pure, Should have an aquarium with plenty of plants background, and some plant, roots or branches floating, to sift the light coming into the aquarium. In any case, Lighting should be dim. To complete the reproduction of their natural biotope, They can be added to the water leaves. Once it starts decomposing leaves, will grow colonies of microbes, to be a secondary power supply for fry, as well as the adult specimens, as chemicals released in the decomposition, perfectly recreate the atmosphere of sewage from which. The filtration must be weak, we must not forget that often live in backwaters of water, where the current is low.


We are facing a fish omnivorous, what release is a predator, feeding on small insects, worms, crustaceans and zooplankton. In the aquarium, we can feed dry food, whenever of the right size, as well as small insects live and frozen as Daphnia or Artemia. The quality of food, positively influences their coloration, as well as reproduction.

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Behavior and compatibility

The mosquito Boraras, It is a very peaceful fish, but also very shy. It is perfect to have a small group of individuals ( 6 u eight), to better look at the community aquarium, but ideally they should remain alone. If you prefer the option of community aquarium, target species should be equally small, like Corydoras pigmeas, Microdevario, small Loricardios, Eirmotusâ € |


The boraras brigittae exhibits behavior comparable to other small cyprinids, with continuous spawning, dispersant and an absolute lack of parental care. In good conditions, the mixture of female and male, Daily spawns will produce small amounts of eggs. If you have a mature aquarium and time, You may be small fry, without intervention at all. But, If you want to get a more controlled reproduction, you must install a breeding tank, with a capacity of 15 liters. For successful breeding, we must ensure the following conditions:

  • The aquarium should be dimly lit, with a mesh bottom, ester A similar, for the eggs to fall to the bottom, they can not be achieved by adults, because they can eat the.
  • The water should have a pH between 5 Y 6.5, with a temperature close to 28 ° C.
  • You can add or moss plants fine, covering towards the middle of the space available. Equip the tank with a sponge filter.
  • Enter two or three pairs of adults in the aquarium. The transfer must be done slowly, to avoid the stress of copies. If they are in good condition, beget should start the next day.
  • When you have placed the first eggs, we remove the adult specimens, and the fry begin to be born in two days.
  • Small survive in their sacks, during a 24 hours, then they will need microscopic food to survive.
  • Ten days, They should be large enough, like to eat nauplii micro genesis of Artemia.


This variety of fish, they have evolved into small fish, You can live in the aquarium, between 6 Y 7 years. If we want the color of our fish, highlight more, we include a deep gravel, They will be much more colorful.

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Photos of the boraras brigittae

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