Emerald Dwarf Rasbora

Emerald Dwarf Rasbora (Danio erythromicron)

The Emerald Dwarf Rasbora is a stunning nano schooling fish, admired for its shimmering emerald-blue coloration, delicate orange markings, and graceful movements. Native to the clear waters of Lake Inle and surrounding streams in Myanmar, this small and elegant species is prized by aquarists for its peaceful temperament, subtle beauty, and suitability for planted nano aquariums. Its compact size and vibrant appearance make it a captivating addition to carefully maintained community setups.

Emerald Dwarf Rasboras are peaceful, social fish that thrive when kept in groups, where they display more natural behaviors and feel more secure. They spend much of their time exploring the middle and lower levels of the aquarium, moving gracefully among plants and hardscape while foraging for small food items. Males often display brighter coloration and more intense markings, especially during courtship, while females tend to have a rounder body shape and slightly softer coloration. Their calm nature makes them excellent companions for other small, non-aggressive fish.

These delicate rasboras thrive in mature, well-planted aquariums with gentle filtration, stable water conditions, and plenty of cover. Dense vegetation, mosses, driftwood, and leaf litter help recreate their natural environment while providing security and encouraging natural behaviors. Due to their small size, they benefit from appropriately sized foods such as crushed flakes, micro pellets, baby brine shrimp, daphnia, and other tiny frozen or live foods. Consistent water quality and a mature aquarium are important for their long-term health and success.

Quick Facts:

• Care Level: Moderate
• Temperament: Peaceful
• Adult Size: 1 inch (2.5 cm)
• Minimum Tank Size: 10 gallons
• Temperature: 68–78°F (20–26°C)
• pH: 6.5–7.5
• Diet: Omnivore
• Schooling: Yes, best kept in groups of 8 or more

With their sparkling emerald coloration, peaceful nature, and elegant schooling behavior, Emerald Dwarf Rasboras are an exceptional choice for aquarists seeking a refined nano fish that brings subtle beauty, movement, and natural charm to planted freshwater aquariums.