Helfrichs-Feuerfisch-Guide

The helfrichi (Nemateleotris helfrichi) is a popular reef aquarium fish reaching 2.5 in (6 cm) in the home aquarium. Originating from the Central Pacific region, it is rated as moderate difficulty and is generally considered reef safe. Its peaceful temperament makes it suitable for community reef setups when proper care guidelines are followed.

Steckbrief


Scientific name	Nemateleotris helfrichi
Max size	2.5 in (6 cm)
Min tank size	20 gal (75 L)
Temperament	Peaceful
Diet	Carnivore (planktivore)
Reef safe	Yes
Care level	Moderate
Origin	Central Pacific

Überblick

The following sections detail exactly how to keep this species thriving in a saltwater reef environment.

Beckenanforderungen

Provide a minimum tank size of 20 gal (75 L) with ample live rock for grazing, hiding, and territory. Maintain standard reef parameters: temperature 75–80 °F, pH 8.0–8.4, salinity 1.024–1.026, alkalinity 8–11 dKH. This species is peaceful enough to add at any point in the stocking order. Moderate flow and lighting that suits your coral mix work well.

Wasserparameter

Maintain standard reef aquarium parameters for long-term health:

Temperature: 75–80 °F (24–27 °C)
pH: 8.0–8.4
Salinity: 1.024–1.026 sg
Alkalinity: 8–11 dKH
Ammonia / Nitrite: 0 ppm
Nitrate: < 20 ppm (lower is better for a reef)

Stability is more important than hitting a specific number. Avoid sudden swings in any parameter.

Ernährung und Fütterung

Feed a carnivore (planktivore) diet consisting of frozen Mysis shrimp, enriched brine shrimp, and marine pellets. Feed 1–2 times daily in small amounts consumed within two minutes. Vary the diet to ensure complete nutrition and vibrant coloration.

Verhalten und Verträglichkeit

This species has a peaceful temperament and coexists well with most reef-safe community fish including clownfish, gobies, and cardinalfish. Fully reef safe with corals, clams, and invertebrates.

Zucht

Breeding Nemateleotris helfrichi in captivity is challenging and rarely achieved. Sexing can be difficult without observing spawning behavior.

Tipps für den Erfolg

Quarantine for at least 2–4 weeks before adding to your display tank.
Provide 20 gal (75 L) minimum—larger is always better for long-term health.
Vary between frozen, pellet, and live foods for optimal nutrition.
Maintain stable water parameters—sudden changes cause stress and disease susceptibility.
Observe the fish eating at the store before purchasing to ensure it is feeding well.

Häufig gestellte Fragen

What tank size does a Nemateleotris helfrichi need?

The minimum recommended tank size is 20 gal (75 L). This provides adequate swimming space, territory, and stable water volume. Larger tanks are always better, especially for active swimmers.

Is this fish reef safe?

Yes, this species is considered fully reef safe and will not harm corals, clams, or invertebrates.

What does this fish eat?

This is a carnivore (planktivore) species. Feed meaty foods: frozen Mysis shrimp, enriched brine shrimp, and high-quality marine pellets.