Celestial Pearl Danio

The Celestial Pearl Danio is a tiny cyprinid fish first described in 2006, native to shallow ponds and marshy grasslands in the Salween River drainage of Myanmar. It belongs to the family Cyprinidae and quickly became notable in the aquarium trade for its striking starry-night pattern of spots against a dark body. Its restricted native range and heavy early collection pressure following its discovery raised conservation concerns, though captive breeding has since reduced pressure on wild populations. It represents one of the more recent notable discoveries of a small, colorful freshwater fish species.

Key field marks:

• Very small, deep-bodied, laterally compressed shape
• Dark navy-blue to blackish body covered in scattered small golden or pearly spots
• Fins washed in orange-red, crossed by bold black bands, especially on the dorsal and anal fins
• Rounded caudal fin, unlike the forked tail of most other danios
• Adults reach only about 2-2.5 cm The dense pearly spotting on a dark body combined with orange-and-black banded fins is unmistakable and distinguishes it from all other small danio-like fish.

Celestial Pearl Danios are native to shallow, densely vegetated ponds, marshes, and slow seasonal pools within the Salween River drainage of Shan State, Myanmar. They favor still or very slow-moving water with abundant aquatic plants, often in areas that can be seasonally isolated from larger river systems. Native water temperatures range roughly 20-24°C, and the habitat is typically clear with neutral to slightly alkaline chemistry. Their restricted, patchy distribution across small marshy habitats makes them more vulnerable to local habitat changes than widely distributed river-dwelling danios.

Celestial Pearl Danios are peaceful, somewhat secretive fish that shoal loosely among dense vegetation, using the cover to avoid predators given their small size and marsh habitat. They forage on tiny invertebrates, zooplankton, and organic particles among plant stems and detritus. Unlike many danios that scatter eggs openly, males display and court females near plant cover, with eggs deposited among fine vegetation and no parental care given afterward; adults may consume eggs or fry encountered later. Their dense, secretive vegetation-based lifestyle contrasts with the open-water schooling seen in many larger danio relatives.