Dwarf Emerald Rasbora
The Dwarf Emerald Rasbora (Microrasbora erythromicron) is a beautiful nano freshwater schooling fish known for its emerald-green body, subtle striping, and red-orange accents. Small, peaceful, and active, this species is a great choice for planted aquariums, nano tanks, and aquascaped freshwater setups.
Dwarf Emerald Rasboras do best in groups, where they feel more secure and show better color and natural behavior. Their small size and peaceful temperament make them a favorite for aquarists who enjoy nano fish, live plants, shrimp tanks, and calm community aquariums.
Key Features
- Beautiful nano freshwater schooling fish
- Emerald-green body with subtle striping
- Red-orange accents that stand out in planted tanks
- Peaceful temperament
- Great for nano aquariums and aquascapes
- Best kept in groups of 8 or more
- Excellent choice for planted freshwater setups
Care Requirements
- Scientific Name: Microrasbora erythromicron
- Common Name: Dwarf Emerald Rasbora
- Adult Size: Around 1 inch
- Temperament: Peaceful schooling fish
- Tank Size: 10 gallons or larger recommended
- Care Level: Easy to moderate
- Diet: Omnivore / micro-omnivore
Water Parameters
- Temperature: 72–78°F
- pH: 6.5–7.5
- Hardness: 3–12 dGH
- Water Flow: Gentle to moderate flow preferred
Diet
Dwarf Emerald Rasboras have small mouths and do best with tiny foods. Feed micro pellets, finely crushed flakes, frozen foods, live foods, baby brine shrimp, daphnia, cyclops, and other small foods. A varied diet helps support color, activity, and overall health.
Schooling Behavior
Dwarf Emerald Rasboras should be kept in groups for best results. A group of 6 is the minimum, but 8 or more is strongly recommended for better confidence, color, and natural schooling behavior.
Ideal Tank Setup
- 10–20 gallon aquarium or larger
- Heavy planting with open swimming space
- Floating plants for shade and comfort
- Darker substrate to help their color stand out
- Gentle filtration and stable water quality
- Plenty of hiding areas with plants, moss, driftwood, or décor
Good Tank Mates
- Chili Rasboras
- Other peaceful nano rasboras
- Ember Tetras
- Pygmy Corydoras
- Otocinclus
- Clown Killifish
- Adult Neocaridina shrimp
- Amano shrimp
- Nerite snails
- Mystery snails
Tank Mates to Avoid
- Large tetras
- Barbs or fin-nipping fish
- Aggressive gouramis
- Cichlids
- Large predatory fish
- Fast or boisterous fish that may outcompete them for food
Shrimp Compatibility
Dwarf Emerald Rasboras are generally safe with adult dwarf shrimp and peaceful invertebrates. Very tiny baby shrimp may be eaten, so moss, plants, and hiding areas are helpful if shrimp are breeding in the aquarium.
Frequently Asked Questions
Are Dwarf Emerald Rasboras good for beginners?
Yes. Dwarf Emerald Rasboras can be good for beginners with a stable, well-planted aquarium. Because they are small, they do best in mature tanks with peaceful tank mates and consistent water quality.
How many Dwarf Emerald Rasboras should I keep together?
Keep at least 6, but a group of 8 or more is better. Larger groups help them feel secure and show more natural behavior.
Are Dwarf Emerald Rasboras safe with shrimp?
They are generally safe with adult shrimp. Very small shrimplets may be eaten, so planted cover and moss are recommended in shrimp breeding tanks.
Do Dwarf Emerald Rasboras need live plants?
Live plants are highly recommended. Plants help reduce stress, provide cover, and make their emerald coloration stand out beautifully.
Are Dwarf Emerald Rasboras rare?
They are considered a less common nano fish and are highly appreciated by aquascapers and hobbyists who enjoy small schooling species.
What do Dwarf Emerald Rasboras eat?
They eat micro pellets, finely crushed flakes, baby brine shrimp, daphnia, cyclops, and other small frozen or live foods.
Shop Dwarf Emerald Rasboras at Tropical Treasures Wyo
Dwarf Emerald Rasboras are peaceful, colorful nano schooling fish that make a beautiful addition to planted aquariums, aquascapes, and calm freshwater community tanks. Shop Dwarf Emerald Rasboras and other nano fish at Tropical Treasures Wyo in Cheyenne, Wyoming.
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