The pearl danio (Brachydanio albolineatus) is the type species of the (sub-)genus Brachydanio. It belongs to the most popular species of ornamental fish in the world and is almost anytiome available in any petshop. However, the other Bracydanio in the closer sense are by far less well known. Among them is Brachydanio roseus that originates from the northern Thailand, northern Laos, and northern Burma.
Currently there is much discussion wether the gender of Brachydanio is masculine (like Danio) or feminine (both Danio and Brachydanio were thought to be feminine by the authors of Brachydanio). If it becomes evident that Brachydanio has to be regarded as feminine, all specific names that are adjectives, like albolineatus (= with a white stripe) or roseus (= rose-coloured), and end by the Latin masculine suffix – us have to be changed to the feminine form with the suffix -a, eg albolineata or rosea. However, we do not follow this opinion. Danio has been described in 1822 as a subgenus of Cyprinus. A subgenus has always the same sex as the genus, so Danio is masculine. Brachydanio has been described in 1916 as a subgenus to Danio, so it also has to be masculine.
Currently we have very pretty wild collected B. roseus in stock.
The species Brachydanio roseus is distinguished from B. albolineatus by the almost totally lack of the rosy (white in preserved specimens) stripe on the caudal peduncle. Displaying males of B. roseus get a bright red shining belly. Lika all Danios, B. roseus is a perfect community fish: lively, colourful, absolutely peaceful, and easy to maintain. One should keep Danios always in groups (10 specimens upwards), they feel better when kept along with conspecifics. B. roseus becomes around 5-6 cm long.
For our customers: the fish have code 413722 on our stocklist. Please note that we exclusively supply the wholesale trade.
Text & photos: Frank Schäfer
|Angaben zum Tier|
|Verfügbare Größe in cm||4-5|