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The species called Axelrod's rasbora (Sundadanio axelrodi) was previously named Rasbora axelrodi. A new genus was created called Sundadanio. These rasboras are known by many different names like - blue neon rasbora and neon blue rasbora. The rasboras are a part of the family Cyprinidae and are danionins. The origin of this fish is found to be from blackwater pools and streams. So, while keeping them in an aquarium, it is very much necessary to be wary of the condition of the water. The rasbora fish is peaceful, active, and a species of good-looking schooling fish, which is a great addition to any planted aquarium tank for your homes.
This neon-blue fish is named after a pet book publisher Herbert R. Axelrod. It would be best if you always keep this gorgeous little fish species with other species of fish of the same size and the same personality. The fish is quite hardy but needs a lot of care to be kept as a pet. Read more about these down below.
Fishes live in most of the water in the world and we don't even know the existence of many species living in the deep corners of the sea. Read some more fun facts on the sockeye salmon and the parrot fish.
This fish is a danionin (Danios, Devarios, Rasboras) and a part of a very popular group of aquarium fishes.
Neon blue rasbora (Sundadanio axelrodi 'blue') belongs to the class of Actinopterygii of the family Cyprinidae in the kingdom of Animalia. They were earlier known as rasbora axelrodi, but later found that they are closely related to a danio instead, but not close enough to be included in the same genus.
The population of the neon blue rasbora is unknown.
The Axelrod's rasbora is found mostly in blackwater pools and streams associated with ancient forest peat swamps. To take proper Sundadanio axelrodi care in the tank, the water should be stained dark-colored brown and the substrate scattered with fallen leaves, twigs, and branches. The water hardness should be made negligible, and the pH needs to be less than five.
The Sundadario axelrodi is native to the Greater Sunda Islands of Borneo and Sumatra. They are also found in Riau Archipelago and Bangka Island off the east coast of Sumatra.
This fish species are always found in schools, and they like to be a part of large schools. In an aquarium of 10 gallons, six or more fishes of the same size should be kept. Depending on size, the rasboras can be teamed with various other small schooling fishes like small tetras (like Green Neon Tetra), gouramis, and many small danios.
This species of neon-blue fish are known to live for two to five years if given proper care and the best living conditions, which include conditions like temperature, pH, and the quality of the water.
These fish are not seen breeding in the tanks as they do not like fluctuating water conditions. There are some cases, however, when the fish has been bred in captivity. The conditions of lighting and water should be optimum for this to happen. A heavily planted and well-established aquarium is required. The fish should have a diet with plenty of live and frozen foods in this duration. If the cover and microfauna, along with proper water conditions, are met, the spawn should appear.
Reports of reproduction in nature or the number of eggs laid are not known.
The conservation status of the neon blue rasbora (Sundadanio axelrodi 'blue') is categorized as Vulnerable by the IUCN Red List. The habitats are degrading, and due to the small distribution of the fish, the population is decreasing rapidly. The precious biotopes in southeast Asia are under threat from rubber and palm oil plantations, building developments, and many other activities by humans.
Neon blue rasbora (Sundadanio axelrodi 'blue') are found in various color morphs, but the differences are very limited and slight. It depends on the places that they are found. The fish found south and east of Sarawak state in Borneo of Malaysia are usually colored blue or green. The fish from the west are red or orange in color. The neon blue coloration is the most popular variant.
Adult males are slimmer and more colorful than adult females. In some morphs, a dark coloration is found in the anterior portion of the anal fin of the males. In other cases, the anal fin is generally red. The females, however, have a colorless anal fin.
The fish with the small size and beautifully colored body make for a beautiful aquarium.
Males produce audible croaking/chirruping sounds when stressed or taken out of the water. The sound is also heard when they fight with other fishes in the tank.
The length of the fish range from 0.75-1.25 in (1.9-3.1 cm).
One of the popular micro fish, the white cloud mountain minnow, is sized 1-1.5 in (2.5-3.8 cm).
The swimming speed of the fish is unknown.
The weight of this fish is not known.
Males and females of the species are not given different names. They are known collectively as neon Axelrod's rasbora (Sundadanio axelrodi).
The babies are called spawns.
The neon blue Rasbora (Sundadanio axelrodi 'blue') are carnivores and have a diet of tiny aquatic crustaceans, worms, insect larvae, and other zooplankton. They feed on small live or frozen foods such as daphnia, nauplii, artemia, and bloodworms in captivity. This helps them develop better coloration and condition.
They are not dangerous.
The best Sundadanio axelrodi care should be provided to the fish as they are very peaceful but needs a lot of attention. These fishes are found as pets all over the world.
Neon blue rasbora (Sundadanio axelrodi 'blue') do not hibernate.
They can cohabit with other small fish species but do not form schools with them.
The population of the neon blue rasbora (Sundadanio axelrodi 'blue') is declining due to frequent habitat degradation and the small distribution of the fish. Axelrod's rasbora is only found in a limited number of places in the world (around 10). In nature, these fish species are endemic to Southeast Asia in the Bangka Islands, Greater Sunda Islands, and Riau Archipelago Islands of Sumatra and Borneo. They are also endemic to West Kalimantan, South Kalimantan, and Central Kalimantan provinces in Indonesia.
The rasboras are a very hardy and peaceful fish species and are loved all over the world as a pet. Due to their habitat origin of blackwater pools and streams, it is necessary to keep the water in the aquarium tank similar to that of their natural home. Leaf litter should be provided in the water to make it seem like their actual habitats. The pH of the water should be no more than five in the planted aquarium tank. The temperature of the water should be kept between 163-174 F (73-79 C) in the tank, and the water quality should seem like the same to replicate their natural homes. The fish needs excellent water quality to thrive and is not recommended as a pet for beginners. There should be moderate lighting, and the tank should be dimly lit. The diet should be flake food, freeze-dried Tubifex, and Bloodworms. Cyclops, Daphnia, and chopped bloodworms can also be fed as food to the fish species. The aquarium tanks should be sized around 10-12 gallons.
These blue fish are one of the best alternatives to the neon tetra or the cardinal tetra.
Here at Kidadl, we have carefully created lots of interesting family-friendly animal facts for everyone to discover! For more relatable content, check out these horn shark facts or thresher shark facts pages.
You can even occupy yourself at home by coloring one of our free printable sundadanio axelrodi coloring pages.
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