Golden Semilarvatus Butterflyfish

Chaetodon semilarvatus

Saltwater Fish Species Group: Butterflyfish Family: Chaetodontidae

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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 Golden Semilarvatus Butterflyfish

General information

The Golden Semilarvatus Butterflyfish is a beautiful species that can add a lot of color to any saltwater aquarium. They have a striking color pattern, with a golden body, black markings on the fins, and a white face. This species can grow up to 6 inches in length and requires a tank of at least 50 gallons with plenty of hiding places.

Diet & nutrition

In the wild, Golden Semilarvatus Butterflyfish feeds on a variety of foods, including algae, small invertebrates, and crustaceans. In captivity, they can be fed a diet of high-quality flakes, pellets, and frozen foods such as brine shrimp, mysis shrimp, and krill.

Diseases

Golden Semilarvatus Butterflyfish is generally hardy and not prone to any specific diseases. However, they can be susceptible to common saltwater fish diseases such as marine ich, velvet, and bacterial infections.

Origination

The Golden Semilarvatus Butterflyfish is native to the Red Sea, the Gulf of Aden, and the coast of East Africa.

Cautions

Golden Semilarvatus Butterflyfish may be aggressive towards other butterflyfish, especially members of the same species. It is important to introduce them to the aquarium last and provide enough hiding spaces to prevent territorial disputes.

Acclimation process

It is important to properly acclimate Golden Semilarvatus Butterflyfish to their new environment to reduce stress and improve their chances of survival. The acclimation process should take at least 30 minutes and involve slowly adding small amounts of water from the aquarium to the transport bag.

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