Danio margaritatus
The celestial pearl danio became an instant hobby favourite for its galaxy-like spots and red fins on a dark body—often sold as “galaxy rasbora.” It is a tiny fish from vegetated hill streams in Myanmar, best in mature planted tanks with soft, clean water and gentle flow. Keep large groups (eight or more) for colour and confidence; shy if kept in small numbers or with large, boisterous fish. Egg scatterer among fine plants or moss; no parental care. Sensitive to poor water quality compared to zebrafish.
Crushed flake or micro pellets; frozen cyclops, baby brine shrimp, or vinegar eels; particles must be tiny.
Frequency: 1–2× daily
Small, varied feeds; colour improves with live or frozen foods and stable water.
Native Region: Myanmar (Hopong east of Inle Lake—small pools and wetlands)
Shallow, plant-rich water; often cool, soft, and clear.
Heavily planted nano or small tank; sponge filter; dwarf shrimp may cohabit carefully.
Activity Level: Moderate
Schooling Size: 8+ recommended
Mid- to lower-water shoaling; timid without cover; avoid large or fast fin-nippers.
Difficulty: Moderate
Type: Egg scatterer
Sexual Dimorphism: Males slimmer with brighter orange fins; females rounder with duller fins.
Spawns in moss or fine plants; adults eat eggs—use spawning mop or separate breeders.
Substrate: Either
Plant Safe: Yes
Moss, stems, and leaf litter; dark substrate can improve contrast.
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