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FishintermediateSaltwater

Helfrichi Firefish

Nemateleotris helfrichi

AnimaliaChordataActinopterygiiGobiiformesPtereleotridae

📍 Indo-Pacific (Indonesia)

Ask Finn

The rarest and most beautiful firefish with lavender body and yellow-tipped dorsal. Commands premium prices. Reef-safe and peaceful.

Size2.5"
Min Tank20g
peaceful
Zonemid

Care Guide

Diet

Helfrichi Firefish are carnivorous and require a varied diet of small meaty foods. Feed high-quality frozen foods such as mysis shrimp, brine shrimp, and small copepods once daily in small portions. Supplement with quality micro pellets designed for small marine fish to ensure complete nutrition.

Behavior

This firefish is peaceful and shy, spending much of its time hovering near the substrate or darting between cover. It is generally solitary or pairs with a mate, and rarely bothers other tank inhabitants. The species is most active during dawn and dusk, displaying characteristic rapid movements and color displays when comfortable.

Breeding

Breeding Helfrichi Firefish in captivity is extremely rare and difficult, with very few documented successes in home aquariums. They require specific environmental triggers, stable conditions, and a bonded pair, making captive reproduction impractical for most hobbyists. Wild-caught specimens are the norm in the aquarium trade.

Common Diseases

Ich (Marine Ich)

Symptoms

White spots on body and fins, rapid breathing, flashing against surfaces

Treatment

Quarantine immediately; treat with copper-based medication or hyposalinity; maintain stable water parameters

Velvet Disease

Symptoms

Fine golden or rust-colored dust on body, lethargy, rapid gill movement

Treatment

Quarantine and treat with copper medication or formalin; increase aeration and maintain optimal water quality

Bacterial Infection

Symptoms

Torn fins, open sores, cloudy eyes, loss of appetite

Treatment

Improve water quality, perform partial water changes, consider antibiotic treatment if severe

Stress-Related Illness

Symptoms

Loss of color, hiding excessively, refusal to eat, weakened immune response

Treatment

Provide adequate hiding spaces, maintain stable parameters, reduce tank disturbances, ensure proper diet

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Quick Facts

pH
8.1–8.4
diet
carnivore
maxSize
2.5 inches
salinity
SG 1.020–1.025
minTankSize
20 gallons
temperature
75–79°F (24–26°C)

Temperature

75–79°F

24–26°C

Stats

Community tips0
Kept by0 hobbyists