Emperor Angelfish - Pomacanthus imperator
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The Emperor Angelfish (Pomacanthus imperator) is a striking and iconic reef fish known for its vivid blue and yellow horizontal stripes and bold facial mask. Highly sought after for its beauty and presence, this semi-aggressive species is best suited for larger, well-established marine aquariums.
Common Name: Emperor Angelfish
Scientific Name: Pomacanthus imperator
Family: Pomacanthidae
Size: Up to 15 inches (38 cm)
Temperament: Semi-aggressive
Difficulty: Moderate to Difficult
Reef Safe: With caution
Native Region: Found throughout the Indo-Pacific, from the Red Sea and East Africa to the central Pacific, inhabiting coral-rich reef slopes and lagoons.
Tank Size: Minimum of 125 gallons
Temperature: 74–80°F (23–27°C)
pH: 8.0–8.4
Salinity: 1.023–1.025
Substrate: Live rock for grazing and hiding; provide open swimming areas and stable rock structures.
• Diet: Omnivorous—offers a mix of spirulina, marine algae, mysis shrimp, and high-quality angelfish preparations.
• Behavior: Semi-aggressive; may show territorial behavior toward other angelfish and similar-shaped tankmates.
• Reef Caution: May nip at soft corals, clam mantles, and sessile invertebrates, particularly if not well-fed.
• Tankmates: Best with other semi-aggressive fish of different body shapes; avoid overly aggressive species.
