Angelfish Regal (Pygoplites Diacanthus)
Regal Angelfish (Pygoplites diacanthus)
The Regal Angelfish is often cited as the "Holy Grail" of the angelfish world. It is a visually spectacular species featuring a brilliant yellow body adorned with vertical blue and white stripes edged in black. Its face is typically a soft grey or blue, and its tail is a solid, vibrant yellow. Unlike many other large angels, the Regal belongs to its own genus, Pygoplites, and is known for its graceful, somewhat shy demeanor and its notorious difficulty in initial acclimation.
Key Information
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Common Name: Regal Angelfish, Empress Angelfish
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Scientific Name: Pygoplites diacanthus
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Origin: Indo-Pacific and Red Sea (Red Sea specimens are often more sought after for their yellow bellies)
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Max Size: 25 cm
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Lifespan: 10–15 years
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Temperament: Semi-aggressive but mostly shy; peaceful with non-angels
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Diet: Specialist Omnivore – Primarily feeds on sponges and tunicates; requires high-quality frozen sponge-based foods
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Care Level: Difficult (Expert only)
Water Parameters
Temperature: 22–27°C pH: 8.1–8.4 Specific Gravity: 1.023–1.025 (Prefer higher, stable salinity) Minimum Tank Size: 475L+
Behaviour & Tank Compatibility
The Regal Angelfish is far less aggressive than Pomacanthus species but remains territorial toward other angelfish. It is a methodical grazer that requires a stress-free environment to thrive. It is not reef-safe, as it will naturally consume sponges and often nips at LPS corals, zoanthids, and clam mantles. However, because of its relatively small mouth and shy nature, some hobbyists successfully keep them in large reefs with "distasteful" soft corals or noxious polyps. Ideal tank mates include peaceful species like Anthias, Cardinalfish, and small Blennies.
Ideal Tank Setup
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Mature System: An established aquarium (1+ years old) with plenty of natural sponge and algae growth is almost mandatory for survival.
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Rockwork: Requires a complex "labyrinth" of live rock with many caves, tunnels, and dark hiding spots where it can retreat if startled.
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Water Quality: Pristine water with very low nitrates is essential; they are highly susceptible to poor environmental conditions and "Popeye" disease.
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Low Traffic: Best kept in a quiet area of the home to prevent the fish from hiding constantly and refusing to eat.
Why Choose the Regal Angelfish?
The Regal Angelfish is a badge of honor for the advanced aquarist. Successfully keeping this species long-term is a testament to a hobbyist's ability to maintain perfect water chemistry and provide a specialized diet. Its pattern is one of the most beautiful in the ocean, offering a regal, almost hypnotic presence. For those who can meet its demanding needs, the Regal is the ultimate centerpiece that embodies the true beauty of the coral reef.
Original: $180.82
-65%$180.82
$63.29
Description
Regal Angelfish (Pygoplites diacanthus)
The Regal Angelfish is often cited as the "Holy Grail" of the angelfish world. It is a visually spectacular species featuring a brilliant yellow body adorned with vertical blue and white stripes edged in black. Its face is typically a soft grey or blue, and its tail is a solid, vibrant yellow. Unlike many other large angels, the Regal belongs to its own genus, Pygoplites, and is known for its graceful, somewhat shy demeanor and its notorious difficulty in initial acclimation.
Key Information
-
Common Name: Regal Angelfish, Empress Angelfish
-
Scientific Name: Pygoplites diacanthus
-
Origin: Indo-Pacific and Red Sea (Red Sea specimens are often more sought after for their yellow bellies)
-
Max Size: 25 cm
-
Lifespan: 10–15 years
-
Temperament: Semi-aggressive but mostly shy; peaceful with non-angels
-
Diet: Specialist Omnivore – Primarily feeds on sponges and tunicates; requires high-quality frozen sponge-based foods
-
Care Level: Difficult (Expert only)
Water Parameters
Temperature: 22–27°C pH: 8.1–8.4 Specific Gravity: 1.023–1.025 (Prefer higher, stable salinity) Minimum Tank Size: 475L+
Behaviour & Tank Compatibility
The Regal Angelfish is far less aggressive than Pomacanthus species but remains territorial toward other angelfish. It is a methodical grazer that requires a stress-free environment to thrive. It is not reef-safe, as it will naturally consume sponges and often nips at LPS corals, zoanthids, and clam mantles. However, because of its relatively small mouth and shy nature, some hobbyists successfully keep them in large reefs with "distasteful" soft corals or noxious polyps. Ideal tank mates include peaceful species like Anthias, Cardinalfish, and small Blennies.
Ideal Tank Setup
-
Mature System: An established aquarium (1+ years old) with plenty of natural sponge and algae growth is almost mandatory for survival.
-
Rockwork: Requires a complex "labyrinth" of live rock with many caves, tunnels, and dark hiding spots where it can retreat if startled.
-
Water Quality: Pristine water with very low nitrates is essential; they are highly susceptible to poor environmental conditions and "Popeye" disease.
-
Low Traffic: Best kept in a quiet area of the home to prevent the fish from hiding constantly and refusing to eat.
Why Choose the Regal Angelfish?
The Regal Angelfish is a badge of honor for the advanced aquarist. Successfully keeping this species long-term is a testament to a hobbyist's ability to maintain perfect water chemistry and provide a specialized diet. Its pattern is one of the most beautiful in the ocean, offering a regal, almost hypnotic presence. For those who can meet its demanding needs, the Regal is the ultimate centerpiece that embodies the true beauty of the coral reef.
