Nemateleotris magnifica (Firefish Goby / Fire Dartfish)
• Small fish safe: ✅ Yes
• Small invert safe: ✅ Yes
• Coral safe: ✅ Yes
• Minimum tank size: 40L+ (preferably 75L+ for pairs or groups)
• Adult size: ~9 cm (3.5 inches)
• Diet: Carnivorous (marine pellets, frozen mysis/brine shrimp, finely chopped seafood)
• Be aware of: Extremely timid and prone to jumping—requires a secure lid. Best kept in pairs or small groups in large tanks but may become territorial toward conspecifics in smaller setups.
Firefish Goby (Nemateleotris magnifica) – A Colorful and Graceful Reef Fish
The Firefish Goby, also known as the Fire Dartfish, is a stunning and peaceful species that brings movement and vibrancy to reef aquariums. Known for its elongated body, elegant dorsal fin, and fiery coloration, this species is an excellent choice for nano and reef tanks. However, Firefish Gobies are shy and easily startled, requiring peaceful tank mates, plenty of hiding spots, and a secure lid to prevent jumping.
Appearance and Coloration
Firefish Gobies are one of the most strikingly colored small reef fish, featuring:
• A white to pale pink front half, gradually transitioning into a deep red or orange tail.
• A long, filamentous dorsal fin, often used for communication or display.
• Bright yellow accents on the face and head, adding contrast.
• Large, expressive eyes, giving them an alert and curious appearance.
Some variations occur depending on region and diet, with some specimens showing more intense red coloration than others.
Natural Habitat and Behaviour
Native to the Indo-Pacific region, Firefish Gobies are found near coral reef slopes and sandy-bottomed lagoons, where they:
• Hover above rocky crevices or burrows, darting inside when threatened.
• Live in loose pairs or small social groups, often establishing a shared hiding spot.
• Use their elongated dorsal fin for signaling, particularly during courtship or territorial displays.
• Are highly alert and quick to retreat, making them difficult to catch in the wild.
In captivity, they prefer a peaceful environment and will spend most of their time hovering near rock formationsbefore quickly darting back to safety.
Tank Requirements and Water Parameters
Firefish Gobies are easy to care for, but they require a secure environment to prevent stress and jumping.
• Minimum tank size: 40L+ (75L+ recommended for pairs or groups)
• Temperature: 24–27°C (75–81°F)
• pH: 8.1–8.4
• Salinity: 1.020–1.025
• Water movement: Moderate to strong (gentle flow around rockwork)
• Filtration: High-quality filtration and regular water changes to maintain stable water conditions.
A tank with plenty of live rock and small crevices will help Firefish Gobies feel secure. A tight-fitting lid is mandatory, as they are known for jumping out of open tanks when startled.
Diet and Feeding
Firefish Gobies are carnivorous and need a varied diet rich in protein to maintain their vibrant colors.
Recommended foods include:
• Frozen mysis and brine shrimp – Their primary diet in captivity.
• High-quality marine pellets and flakes – Enriched formulas work best.
• Finely chopped seafood (shrimp, squid, or fish) – Occasional treats.
• Live foods (copepods, amphipods, or blackworms) – Encourages natural feeding behavior.
Feed once or twice daily, ensuring food reaches them before more aggressive tank mates outcompete them.
Compatibility and Tank Mates
Firefish Gobies are peaceful and community-friendly, making them excellent for:
✔ Clownfish, Blennies, Fairy Wrasses, and other small reef fish.
✔ Peaceful invertebrates, including shrimp, snails, and crabs.
✔ Coral reef tanks, as they are entirely reef-safe.
Avoid housing with:
❌ Large, aggressive fish (e.g., Triggerfish, aggressive Dottybacks, large Wrasses) that may intimidate or eat them.
❌ Other Firefish Gobies in small tanks, unless introduced as a bonded pair or in a large tank with plenty of hiding spots.
❌ Boisterous or fast-moving species, as they may outcompete Firefish Gobies for food.
If keeping a pair or small group, introduce them at the same time to establish territories peacefully.
Hiding and Jumping Behavior
Firefish Gobies are naturally timid, so they:
• Require multiple hiding spots within rock formations.
• May disappear into crevices when feeling threatened, especially in new environments.
• Are highly prone to jumping if startled by loud noises, bright lights, or aggressive tank mates.
⚠ A secure lid or mesh cover is essential to prevent losses due to jumping.
Health and Disease Considerations
Firefish Gobies are generally hardy, but they can be susceptible to:
• Marine Ich (Cryptocaryon irritans) – Stress-related; quarantine new fish before introduction.
• Bacterial infections – Often caused by injuries from jumping or poor water quality.
• Malnutrition – Ensure they receive small, frequent feedings to prevent starvation.
Keeping stable water conditions, offering a high-protein diet, and ensuring a stress-free environment will help maintain their health.
Lifespan and Long-Term Care
With proper care, Firefish Gobies can live up to 5 years in captivity. Their graceful swimming, vibrant coloration, and peaceful nature make them one of the best choices for reef tanks.
Why Choose a Firefish Goby?
✔ Fiery red and white coloration with an elegant dorsal fin – Visually stunning.
✔ Active yet peaceful, making them ideal for community tanks.
✔ Hardy and adaptable, making them great for beginner and experienced aquarists.
✔ Can live in nano tanks, thriving in small or large reef systems.
✔ Completely reef-safe, with no risk to corals or invertebrates.
⚠ Important Considerations Before Buying a Firefish Goby:
🚫 Extremely prone to jumping – A secure lid is necessary.
🚫 Timid nature – Requires peaceful tank mates.
🚫 Best kept singly or in bonded pairs, as conspecific aggression may occur in small tanks.