How long do Firefish live?
Firefish live about 3-5 years with good marine care. A secure lid and stable water are what protect that lifespan — jumps are the leading loss.
What do Firefish eat?
They take small frozen/live foods like brine shrimp and mysis, and often pellets once settled. The mistake is only large foods they cannot catch; offer small, frequent feedings.
Tank size and water parameters
A 20-gallon (75 L) tank suits one, larger for a pair. Target 72-82°F (22-28°C), pH 8.1-8.4, specific gravity 1.020-1.025, ammonia/nitrite zero, nitrate under ~20 ppm. Provide a cave and a tight-fitting lid.
Common mistakes with Firefish
Key errors: an open or loose lid (they jump out); aggressive tank mates that stress them; no cave to retreat into; and large foods they cannot eat.
Beginner mistakes to avoid
- No tight lid — firefish are famous jumpers; cover the tank fully.
- Aggressive tank mates — they are shy and easily bullied.
- No cave — they need a retreat to feel secure.
- Food too large — offer small, frequent feedings.