Firefish — Nemateleotris magnifica

Peaceful, shy dartfish. Jumps.

Quick facts

• Size: 7–9 cm

• Temperament: Peaceful, timid

• Reef-safe: Yes

• Minimum tank: 20–30 gal / 75–115 l (single); larger for a bonded pair

• Cover: Tight, gap-free lid required

Aquarium requirements

• Aquascape: Caves and overhangs for bolt-holes; open sand/rock front for hovering.

• Water: pH 8.1–8.4, salinity 1.025–1.026, temp 24–26 °C (75–79 °F), NH3/NO2 0, NO3 <20 ppm.

• Flow: Low to moderate with calm zones.

Diet

• Frequency: 1–2× daily, small portions.

• Foods: Enriched mysis and brine shrimp, finely chopped marine meats, small marine pellets; occasional copepods.

Behavior and compatibility

• Keeping: Best singly or as a true bonded pair; conspecifics often fight in small tanks.

• Tankmates: Peaceful species only. Avoid boisterous wrasses, dottybacks, large hawkfish, and aggressive clowns.

• Introduction: Add early; easily bullied. Provide multiple retreats.

Acclimation and care

• Acclimate: Slow drip 30–45 min; dim lights.

• Stress management: Quiet environment, tight lid, and cover all gaps around plumbing.

• Notes: Will “dart” into a burrow or rock crevice when startled; may refuse food until settled.