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Danio margaritatus, the celestial pearl danio, often referred to in the aquarium trade as galaxy rasbora or Microrasbora sp. 'Galaxy', [2] is a small freshwater ray-finned fish belonging to the family Danionidae. This fish is from Myanmar and Northern Thailand [3] (in Salween basin).
The harlequin rasbora is a shoaling fish, [2] and should be kept in a group comprising a minimum of six individuals, though shoals of larger numbers are preferable not only from the standpoint of the well-being of the fish, but from an aesthetic standpoint—a large shoal of harlequin rasboras presents a striking vista even to non-fishkeepers ...
Rasbora is a genus of fish in the family Danionidae. [1] They are native to freshwater habitats in South and Southeast Asia, as well as southeast China. [2] A single species, R. gerlachi, is only known from an old specimen that reputedly originated from Africa (), but this locality is considered doubtful. [3]
Rasbora and related genera were excluded. The aquarium popular Celestial Pearl Danio / Galaxy Rasbora was confirmed as Danio margaritatus, being most closely related to D. erythromicron, and next to D.choprae. Within the devario clade, Microdevario was erected for all but one of the former Microrasboras. There is still uncertainty over the ...
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The genus name Microrasbora means "small Rasbora", but these fish appear to be more closely related to the Danio species than Rasbora. Speculation exists that Microrasbora erythromicron may be transferred to the genus Danio, but this now seems unlikely. Microrasbora erythromicron; Microrasbora gatesi; Microrasbora kubotai; Microrasbora nana
Rasbora sarawakensis males reach a maximum standard length of 4.5 cm. [2] It is a relatively stout bodied Rasbora with a large, pointed head. It has a golden ground colour with orange fins and blue longitudinal stripe. [3] The less colourful females are normally larger and more pot-bellied than the more highly coloured males.
Originally described as a rasbora, Rasbora axelrodi, this tiny species was later deemed to be more closely related to the danios but not enough to be moved into the genus Danio. Sundadanio axelrodi reaches a maximum size of 1.7 cm. Sundadanio was considered monotypic until the genus was reassessed by Conway, Kottelat and Tan in 2011. [3]