Orchid Cardinalfish

Orchid Cardinalfish (Sphaeramia nematoptera) is native to Indo-Pacific reef ecosystems. Wild populations distribute across coral reefs from East Africa through Indonesia, the Philippines, and into the western Pacific. Captive-bred Orchid Cardinalfish is increasingly available and is the more sustainable choice when you can find it.

Orchid Cardinalfish requires a minimum of 30 gallons for healthy adults. The minimum is based on 3 inches adult size and territorial range. For Orchid Cardinalfish, plan a mature reef tank with stable parameters, sand bed, live rock for cover, and reef LED if photosynthetic.

Orchid Cardinalfish requires standard reef parameters: temperature 76-80°F, specific gravity 1.025, pH 8.1-8.4, alkalinity 8-9 dKH, calcium 420-450 ppm, magnesium 1300-1400 ppm, ammonia + nitrite 0 ppm, nitrate under 10 ppm. Use a refractometer (not hydrometer) to measure salinity.

Orchid Cardinalfish is a carnivore. Provide frozen mysis, brine, finely chopped seafood, and quality carnivore pellets. Live food triggers feeding response in stressed arrivals. Browse our food guides for product recommendations.

Orchid Cardinalfish is best paired with peaceful reef-tank species in similar size class. Avoid known fin-nippers and large aggressive species.

Orchid Cardinalfish reaches 3 inches at adulthood with a captive lifespan of 5-7 years with proper care.

Orchid Cardinalfish breeding in captivity ranges from straightforward to very difficult. Captive-bred specimens are increasingly available from sustainable aquaculture facilities.

Orchid Cardinalfish is susceptible to ich, velvet, marine flukes, and bacterial infections. Quarantine new Orchid Cardinalfish for 4-6 weeks before adding to display.

Orchid Cardinalfish is sold at LFS, online retailers, and direct from breeders. Browse live Orchid Cardinalfish from vetted Fast Aquatics vendors with carrier-tracked overnight shipping, climate-aware hold logic, and a 4-hour DOA window with photo-evidence claims.