Dwarf Emerald Rasbora Care Guide
Danio erythromicron · Freshwater Fish
What Dwarf Emerald Rasbora look like
The Dwarf Emerald Rasbora (Danio erythromicron) exhibits a diminutive, laterally compressed body that typically reaches a maximum adult size of approximately 2.5 to 3 inches (6.35 to 7.62 cm). The species is characterized by a vibrant pinkish-orange base color adorned with up to 15 striking emerald green to blue vertical bars, which serve as a form of camouflage in their natural habitat. Sexual dimorphism is subtle; males tend to display slightly brighter coloration and a more streamlined body shape compared to females, which are generally rounder and fuller, especially when gravid. Defensive adaptations include rapid swimming and the ability to blend into dense aquatic vegetation. Notably, they possess a small adipose fin and a forked caudal fin, which enhances their agility in the water column.
Behavior & temperament
Dwarf Emerald Rasboras are inherently social fish, often found in small schools within their native habitats in Myanmar. They exhibit a peaceful temperament, making them suitable for community tanks, and prefer to dwell in the mid to upper levels of the water column. Their breeding behavior is characterized as an egg scatterer, where females release eggs among fine-leaved plants or substrate, and males fertilize them externally. During breeding, males may display increased aggression towards one another, but this behavior is typically mild and short-lived. Outside of breeding, they are known for their active and curious nature, often exploring their environment and interacting with tank mates.
Diet & feeding
In the wild, Dwarf Emerald Rasboras are omnivorous, feeding on a varied diet that includes small invertebrates, zooplankton, and plant matter. In captivity, they thrive on a balanced diet of high-quality flake food, micro-pellets, and live or frozen foods such as daphnia and brine shrimp to ensure optimal health and coloration.
Behind the name
Danio (from the Latin 'danio', meaning 'to swim') and erythromicron (from the Greek 'erythros', meaning 'red', and 'micron', meaning 'small'), referring to the fish's small size and vibrant coloration.
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping Dwarf Emerald Rasbora?
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