Goldflake Angelfish

Apolemichthys xanthopunctatus

Saltwater Fish Species Group: Angel Large Family: Pomacanthidae

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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 Goldflake Angelfish

General information

The Goldflake Angelfish displays beautiful gold spots throughout the body. The mouth region of this angel is brightly colored in blue and the fins, which are black in color, are bordered by a striking blue. A single Goldflake Angelfish will do well in large tanks with plenty of hiding places. Once established, the Goldflake Angelfish may become territorial. This Angelfish is one of the safer choices of the large Angels for the reef aquarium and has proven not to pick on sessile invertebrates. This was once a very rare Angelfish to the hobby and has recently become available.

Diet & nutrition

Goldflake angelfish are omnivores feeding on benthic algae, seaweeds, zoobenthos, sponges and tunicates in the wild. In captivity, a varied diet is also suggested for the nutrition of this lare angelfish. It is best that at least two thirds of their diet consists of vegetable foods, preferably from live rocks with plenty of algae growth, and the rest of their diet consisting of sponge, tunicates, and meaty food such as chopped fish and shrimp.

Determining sex

Sexual dimorphism not obvious with this species but males may be larger than the females.

Breeding & spawning

Goldflake angelfish are known broadcast spawners releasing their eggs and sperms at dusk in the water column. Courtship for this species usually occurs at dusk, this then progresses to an ascent to the water column by the males followed by females which eventually lead to the release of gametes in the water column for external fertilization. During courtship the male will trail behind the female positioning his snout to near the female's abdomen.

The female will then turn to her side and both will release a white cloud of gametes containing the sperm and eggs. This spawning behavior is usually observed in large tanks such as in public aquariums.

Diseases

Prone to White Spot Disease and Velvet Disease which causes blotchy coloration on the dark skin areas.

Also susceptible to the viral infection, Lymphocystis which resembles a cauliflower-shaped nodule on the fins and mouth which may prevent the fish from eating.

Apolemichthys xanthopunctatus is also prone to parasitic infections from monogenetic flukes acquired from live rocks in the aquarium.

Origination

This large angelfish is native to the Pacific Ocean and is widely distributed from the Gilbert Islands to the Line Islands. They are particularly found in the localities of Kapingamarangi Atoll (Micronesia), Canton (Kiribati), Nauru, Howland Island and Baker Island, Fanning Island and Christmas Island.

Cautions

They are considered a threat to anemones, LPS and SPS corals, soft corals, zoanthids, sponges and tunicates, and other sessile invertebrates.

Acclimation process

It is best add Goldflake angelfish specimen in the aquarium that are sub-adult since they adapt to captivity faster, readily accepts a wider variety of aquarium food compared to juveniles that tend to be picky and reluctant.

They do well in aquarium setups with plenty of live rock for feeding and hiding, and an open area for 150 gallons swimming. These angels are semi-aggressive, thus it is best if they are the only angelfish in the tank and/or they should be the first larger angelfish to be added. Tank size must be at least 150 gallons.

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