Purple Firefish

Nemateleotris decora

Saltwater Fish Species Group: Dartfish Family: Gobiidae

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Water parameters

Temp 76-80 F Temperature

Maintaining a stable and appropriate temperature is critical for the survival of aquatic life.

pH 7.8 - 8.4 potential of Hydrogen

Measuring the acidity or alkalinity of water on a 0–14 scale, where 7 is neutral, 7 is alkaline.

NO3 1-20 ppm Nitrate

While less toxic than ammonia, high nitrate levels (above 40–80 ppm) are important to monitor because they can cause fish stress, stunted growth, and harmful algae blooms.

NO2 <0.0001 ppm Nitrite

It is a highly toxic, intermediate compound in the nitrogen cycle produced from broken-down ammonia

PO4 0.01 - 0.1 ppm Phosphate

It is essential for plant development but must be managed, as excess levels trigger nuisance algae blooms and inhibit coral calcification.

NH3 <0.1 ppm Ammonia

It is the primary killer of aquarium fish, causing gill damage, stress, and death

Ca 380 - 450 ppm Calcium

Supporting the growth, skeletal structure, and shell formation of corals, mollusks, crustaceans, and coralline algae

KH 8 - 12 dKH Alkalinity

It acts as a shield, neutralizing acids to prevent dangerous pH "crashes" that can harm fish, corals, and plants.

Mg 1200 - 1400 ppm Magnesium

It enables coral growth by supporting skeletal formation, assists in metabolic processes, and ensures that calcium is available for corals, clams, and coralline algae.

SG 1.023 - 1.026 SG Salinity

Essential for maintaining stable, natural water parameters, proper osmoregulation, and stress-free environments for marine fish and corals

ORP 250 - 400 mV Oxidation-Reduction Potential

A higher positive mV indicates clean, oxygen-rich water with high water quality, while low readings indicate high pollution.

About Purple Firefish

General information

The Purple Firefish, also known as the Decorated Firefish, is a small saltwater fish that is popular among aquarium enthusiasts. They grow up to 3 inches (8 cm) in length and are known for their striking purple and yellow coloration. The Purple Firefish is a peaceful species that does well in groups of three or more.

Diet & nutrition

In the wild, Purple Firefish feed on zooplankton and small crustaceans. In captivity, they can be fed a variety of small frozen or live foods, such as brine shrimp, Mysis shrimp, and small pieces of seafood. It is important to feed them small amounts multiple times per day to ensure they are getting enough to eat.

Determining sex

The Purple Firefish is difficult to sex visually.

Breeding & spawning

Breeding the Purple Firefish in captivity is difficult, and there are no known breeding programs. In the wild, they spawn in pairs, laying their eggs in a nest on the ocean floor.

Diseases

The Purple Firefish is relatively hardy and not prone to any specific diseases. However, they can be affected by typical saltwater fish diseases, such as ich and fin rot.

Origination

The Purple Firefish is native to the Indo-Pacific region, specifically the Red Sea, east coast of Africa, and throughout the western Pacific Ocean.

Cautions

The Purple Firefish is generally a hardy and peaceful species that is safe to keep with other small, peaceful fish. However, they may become aggressive towards other fish that are similar in appearance or size.

Acclimation process

When introducing a Purple Firefish to a new aquarium, it is important to slowly acclimate them to their new environment. This can be done by floating the bag containing the fish in the aquarium for 15-20 minutes to allow the temperature in the bag to adjust to the aquarium temperature. Then, gradually add small amounts of water from the aquarium to the bag over the course of 30-45 minutes before releasing the fish into the aquarium.

All photos

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