Mosquito Rasbora (Boraras brigittae) is an intermediate-level freshwater fish that needs at least 10 gallons and 73-82°F. A tiny red-orange nano fish, one of the smallest in the hobby. It does best in a quiet planted tank with gentle flow and only calm, small tankmates; larger fish will bully or eat it.
Care facts at a glance
| Scientific name | Boraras brigittae |
|---|---|
| Family | Danionidae |
| Origin | Borneo |
| Adult size | 0.8 in |
| Minimum tank | 10 gallons |
| Temperature | 73-82°F |
| pH | 5.0-7.0 |
| Temperament | Peaceful, shy |
| Social behavior | Schooling, keep 8+ |
| Swim level | Mid to upper |
| Difficulty | Intermediate |
| Diet | Micro pellets, crushed flakes, baby brine shrimp, microworms |
| Typical lifespan | 2-4 years |
Quick tips
- Keep a group of eight or more.
- Do not mix with fish that can swallow them.
- Offer tiny foods; large pellets are too big.
San Diego water
Prefers softer, more acidic water than San Diego's tap (pH roughly 7.6-8.6, hard). Most keepers blend tap with RO/DI water or use a remineralized RO/DI supply. Learn the numbers in our San Diego tap water guide.
Before you buy
Make sure your tank is cycled (how to cycle a tank), check your numbers with the water testing guide, and use the compatibility guide to check tankmates. These are general ranges; individual fish and local water vary.
Find it at Pet Zone
Pet Zone Tropical Fish is a San Diego aquarium store with two locations. Stock changes daily, so call ahead if you are after a specific species or plant. Shop online at petzonesd.com.
4160 Convoy St, San Diego, CA 92111
(858) 987-0309
Open daily, 10am-6pm
Aquascaping, planted tanks
4266 University Ave, San Diego, CA 92105
(619) 283-1812
Closed Monday; Tue-Fri 10:30am-6pm, Sat 11am-6pm, Sun 11am-4pm
Monster fish, koi