Maculosus Angelfish

Pomacanthus maculosus

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 Maculosus Angelfish

General information

Pomacanthus maculosus is a marine angelfish living mainly in coral and rocky areas, in shallow to moderate depths (~40 ft), or more often in silty reef areas than in rich coral growth. It occasionally makes its way into the aquarium trade. Juveniles of the Maculosus angelfish have a deep blue body coloring with narrow vertical whitish thin brs oalong their sides. As the fish grows, they lose their rounded dorsal and anal fins and becomes more pointed. Caudal fin of the adult Maculosus angelfish has a whitish to yellow with numerous fine yellow dots and the margin of the fin is white. 

Diet & nutrition

The Maculosus angelfish is an omnivore feeding mainly on sponges. The diet of this angelfish in the tank should include Spirulina, marine algae, meaty items, and high-quality angelfish preparations containing sponges.

Determining sex

No physical characteristic differentiates a male Maculosus angelfish from a female one.

Breeding & spawning

The Maculosus Angelfish is hermaphroditic and external spawners. Females may change to males when the need arises. Spawning usually occurs at dusk to sunset, where the male and females release their gametes into the water column.

Diseases

This angelfish is alsoprone to acquire diseases that are borne within the captive saltwater environment such as Saltwater Ich or White spot Disease and Marine Velvet Disease. They are also vulnerable to viral infections such as Lymphocystis which are small nodules on the fish fins and mouth. This angelfish is also prone to contract parasitic infections such as monogenetic flukes

Origination

These marine angelfish are mostly found in the Western Indian Ocean particularly in the Red Sea, Persian Gulf, and Gulf of Oman towards the Mediterranean.

Cautions

The Maculosus angelfish is generally a solitary, aggressive and territorial angelfish. They tend to go after angelfish with the same color but can be housed with aggressive and semi-aggresive tankmates. This angelfish tends to pick on live corals, clam mantles, and slow-moving or sessile inverts like the sea cucumbers. Other invertebrates that this angelfish may attack includes oysters, scallops and feather dusters.

Acclimation process

Maculosus angelfishes should be kept in tanks with a capacity of 200-300 gallons for optimum life span and to avoid stress. It should have plenty of spaces for swimming and should be well decorated with rocks to move in and out of. When adding into the tank, this angelfish should be one of the last fish, if not the last fish, to be added to avoid harming other species in the tank. pH levels should be kept at 8.0-8.4 to avoid causing health problems to the angelfish.

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