Exclamation Point Rasbora (Boraras urophthalmoides)
The Exclamation Point Rasbora (Boraras urophthalmoides) is a tiny, peaceful nano fish named for the distinctive exclamation-point-shaped marking near its tail. Native to Southeast Asia, this miniature schooling species is perfect for nano aquariums, shrimp tanks, and heavily planted community setups.
Despite their small size, Exclamation Point Rasboras display beautiful bronze, copper, and reddish tones under proper lighting and thrive when kept in large schools. Their calm temperament and fascinating behavior make them a favorite among aquascaping enthusiasts and nano fish keepers.
Key Features
- Distinctive exclamation-point tail marking
- Perfect nano aquarium fish
- Peaceful schooling behavior
- Shrimp-safe community species
- Beautiful copper and red coloration
- Excellent for planted aquariums
- Small adult size ideal for nano tanks
Care Guide
- Scientific Name: Boraras urophthalmoides
- Common Name: Exclamation Point Rasbora
- Adult Size: 0.75–1 inch
- Temperament: Peaceful
- Care Level: Easy
- Tank Size: 5 gallons minimum
- Temperature: 74–82°F
- pH: 5.5–7.5
- Diet: Omnivore
- Lifespan: 3–5 years
Tank Setup
Exclamation Point Rasboras thrive in heavily planted aquariums with gentle filtration, dark substrates, and plenty of cover. Floating plants and driftwood help recreate their natural habitat while enhancing coloration.
For the best display, keep them in groups of at least 8–10 fish. Larger schools create stunning natural schooling behavior and increase confidence.
Diet & Feeding
Due to their tiny mouths, Exclamation Point Rasboras do best with small foods including:
- Micro pellets
- Crushed flakes
- Baby brine shrimp
- Microworms
- Daphnia
- Frozen cyclops
A varied diet helps maintain vibrant coloration and overall health.
Tank Mates
- Chili Rasboras
- Phoenix Rasboras
- Kubotai Rasboras
- Pygmy Corydoras
- Tailspot Pygmy Corydoras
- Small Tetras
- Shrimp
- Snails
- Other peaceful nano fish
Frequently Asked Questions
Q: Why are they called Exclamation Point Rasboras?
A: They have a unique black marking near the tail that resembles an exclamation point.
Q: How many should I keep together?
A: A group of 8–10 or more is recommended for natural schooling behavior and reduced stress.
Q: Are they safe with shrimp?
A: Yes. They are one of the best fish for shrimp-friendly aquariums.
Q: Are they good for nano tanks?
A: Absolutely. Their tiny size makes them ideal for nano and planted aquariums.
Q: How large do they get?
A: Adults typically reach about 0.75–1 inch in length.
Available at Tropical Treasures Wyo
Shop healthy Exclamation Point Rasboras at Tropical Treasures Wyo in Cheyenne, Wyoming. These peaceful nano schooling fish are perfect for planted aquariums, shrimp tanks, and freshwater community setups.
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