Red Firefish (Nemateleotris magnifica)
• Small fish safe: ✅ Yes
• Small invert safe: ✅ Yes
• Coral safe: ✅ Yes
• Minimum tank size: 75 liters (20 gallons)
• Adult size: Up to 9 cm (3.5 inches)
• Diet: Carnivorous, primarily feeding on zooplankton
• Be aware of: Known to jump, so a secure lid is essential; prefers to be kept in pairs or small groups if the tank is large enough; can be timid, requiring hiding spots
Appearance and Coloration
The Firefish Goby is a stunningly vibrant species with a pale white to yellow front half that transitions into a rich orange-red coloration towards the tail. A distinct elongated dorsal fin, which can be raised like a flag when alarmed, adds to its striking appearance. The eyes are large and expressive, giving it an alert and inquisitive look.
Natural Habitat and Behavior
In the wild, Nemateleotris magnifica inhabits reef slopes and outer reef lagoons, typically at depths ranging from 6 to 70 meters (20 to 230 feet). They are commonly found hovering just above the substrate, darting into rock crevices when threatened. Their shy nature makes them prone to stress, so a peaceful environment with plenty of hiding places is ideal in captivity.
Tank Requirements and Water Parameters
• Minimum Tank Size: 20 gallons (75 liters) for a single specimen, with larger tanks needed for pairs or groups.
• Water Parameters:
• Temperature: 24°C – 27°C (75°F – 81°F)
• pH: 8.1 – 8.4
• Specific Gravity: 1.020 – 1.025
• Aquascaping: Live rock formations with caves and crevices for hiding, along with open swimming space.
• Lighting: Moderate to bright, as they naturally inhabit well-lit reef environments.
• Water Movement: Moderate flow, mimicking their natural habitat.
A tight-fitting lid is a must to prevent jumping, as Firefish Gobies are known to leap when startled.
Diet and Feeding
Firefish Gobies are carnivorous and thrive on a diet rich in meaty foods:
• Natural Diet: Zooplankton and small invertebrates.
• Captive Diet:
• Mysis shrimp
• Brine shrimp
• Copepods
• Finely chopped marine fish and seafood
• High-quality marine flakes and pellets
They should be fed 2-3 times per day to maintain their energy levels.
Compatibility and Social Structure
• Temperament: Generally peaceful but may become aggressive toward conspecifics in smaller tanks. Best kept singly unless in a mated pair or a large enough tank where multiple individuals can establish territories.
• Tank Mates:
• Peaceful community fish such as clownfish, gobies, and small wrasses.
• Avoid aggressive or fast-moving species, such as dottybacks or large angelfish, which may intimidate or outcompete them for food.
• Reef Compatibility: 100% reef-safe; does not harm corals or invertebrates.
Important Considerations
• Jumping Behavior: They are notorious jumpers and require a securely covered tank.
• Tank Maturity: Best suited for established tanks with stable water conditions.
• Stress Sensitivity: Can be shy when first introduced, requiring patience to acclimate.