| Scientific Name | Pomacanthus imperator |
| Common Names | Emperor Angelfish, Imperial Angelfish |
| Max Length | 15 inches (38 cm) |
| Min Tank Size | 125 gallons (473 liters) for juveniles; 220 gallons (832 liters) or larger for adults. Their large size and active swimming require substantial space. |
| Temperament | Semi-aggressive and territorial, especially toward other angelfish. Introduce as one of the last additions and pair with hardy, dissimilar tankmates like tangs or triggers. |
| Reef Safe | ✗ No |
The Emperor Angelfish is a showpiece with its bold patterns. Adults display horizontal blue and yellow stripes on the body, a blue face with a yellow mask around the eyes, and a yellow tail. Juveniles have a dark blue body with white concentric circles that transform dramatically as they grow. Native to Indo-Pacific reefs from the Red Sea to the Tuamotu Islands, they prefer coral-rich areas with caves at 1-80 meters depth. Stable water parameters (temperature 24-28°C, pH 8.1-8.4, specific gravity 1.020-1.025) and good oxygenation are crucial. Their size and dietary needs suit experienced aquarists, but their vibrant colors make them a captivating addition.
Omnivorous, consuming sponges, algae, tunicates, and small invertebrates in the wild. In aquariums, provide sponge-based formulas, algae sheets with spirulina, and frozen foods like mysis shrimp or brine shrimp. Feed small amounts 2-3 times daily. Juveniles adapt more easily to prepared foods.
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