Species: Emerald Rasbora (Celestichthys erythromicron)
Also known as: Emerald Dwarf Rasbora
The Emerald Rasbora is a stunning nano fish prized for its shimmering emerald-green body and bold vertical striping. Native to Myanmar, this peaceful schooling species brings vibrant color and active movement to planted aquariums. Their small size and calm temperament make them ideal for nano and community tanks.
Emerald Rasboras display a metallic green body with distinct dark vertical barring and subtle red-orange highlights in their fins. When kept in groups, their coloration intensifies, especially under proper lighting and a planted aquascape. They are constantly active yet peaceful, creating beautiful mid-water movement in aquariums.
These fish thrive in well-maintained tanks with live plants, soft lighting, and gentle flow.
Easy to Moderate
Peaceful, schooling species
Best kept in groups of 6 or more (8–12 recommended for best behavior and color)
Up to 1 inch (2.5 cm)
3–5 years with proper care
Omnivorous
Thrives on:
High-quality micro pellets or crushed flakes
Frozen foods (baby brine shrimp, daphnia, cyclops)
Live foods for enhanced coloration
A varied diet promotes optimal health and vibrant coloration.
Minimum 10 gallons
Larger tanks recommended for bigger schools
Temperature: 72–78°F (22–26°C)
pH: 6.5–7.5
Hardness: Soft to moderately hard water
Stable, clean water conditions are essential.
Emerald Rasboras are peaceful and do best in community tanks with other small, non-aggressive species such as:
Chili Rasboras
Celestial Pearl Danios
Small Corydoras
Shrimp (in well-planted tanks)
Avoid housing with large or aggressive fish.
They prefer planted aquariums with open swimming areas and shaded spots.
Excellent nano fish for aquascapes
Color intensifies in well-planted tanks
Keep in schools for natural behavior
Ideal for shrimp-safe community setups
