Neon Blue Rasbora Care Guide
Sundadanio axelrodi · Freshwater Fish
What Neon Blue Rasbora look like
The Neon Blue Rasbora, scientifically known as Sundadanio axelrodi, exhibits a diminutive, laterally compressed body that typically reaches a maximum adult size of approximately 1 inch (2.5 cm). This species is characterized by its striking electric blue coloration, which is most pronounced along a narrow iridescent stripe running longitudinally from the head to the caudal fin. The body is translucent, allowing for the vibrant hues to shimmer under light. Sexual dimorphism is subtle; males tend to display more intense coloration and a slightly more elongated body compared to females, especially during breeding periods. Defensive adaptations include a small size that allows for quick evasive maneuvers and a schooling behavior that provides safety in numbers. The dorsal fin is small and triangular, while the anal fin is elongated and slightly rounded, contributing to its agile swimming capabilities. The presence of a lateral line system aids in detecting vibrations in the water, enhancing its ability to navigate its environment.
Behavior & temperament
Sundadanio axelrodi is a social species that thrives in small, cohesive schools, often exhibiting a hierarchical structure within these groups. They are primarily found in the upper water column, favoring densely vegetated areas in their native habitats of Southeast Asia, particularly in Borneo. Breeding behavior involves egg scattering, where females release eggs among plants, and males fertilize them externally. The species is generally peaceful, exhibiting a calm temperament, but may display slight territoriality during breeding. Their schooling nature and active swimming patterns make them a lively addition to community aquariums.
Diet & feeding
In the wild, the Neon Blue Rasbora is an omnivore, feeding on a varied diet that includes small invertebrates, zooplankton, and plant matter. In captivity, they thrive on high-quality flake foods, micro-pellets, and live or frozen foods such as daphnia and brine shrimp to ensure a balanced diet.
Behind the name
Sundadanio (from 'Sunda', referring to the Sunda Islands; 'danio', a term used for small fish); axelrodi (named in honor of Herbert R. Axelrod, an ichthyologist and aquarium fish expert).
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping Neon Blue Rasbora?
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