Emperor Angelfish: Juvenile

Pomacanthus imperator


(0 Reviews)

Emperor Angelfish: Juvenile

Emperor Angelfish: Juvenile

Pomacanthus imperator


(0 Reviews)

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Care Facts

Care Level: Moderate
Temperment: Semi-Aggressive
Diet: Omnivore
Origin: Indo Pacific
Acclimation Time: 4+ hours
Reef Safe: Monitor
Coral Safe: Monitor
Invertebrate Safe: Monitor
Minimum Tank Size: 150+ Gallons
The Emperor Angelfish, Pomacanthus imperator, also known as the Imperator Angelfish has a blue body covered with bright yellow horizontal stripes, a black mask outlined in vibrant blue lines and a yellow tail. Like many large Angelfish their appearance will change dramatically from the juvenile to adult stage. Due to aggression towards other Angelfish they are best kept singly but will do well with other larger fish. 

They are not reef safe, as they will nip at soft and stony polyp corals, sessile invertebrates and clam mantles. Diet should include a variety of spirulina, marine algae, high quality angelfish preparations, mysis and brine shrimp, 3 times daily. Once the Emperor Angelfish reaches about six inches, it will usually reach its final coloration form. 



Keeping the Emperor Angelfish (Pomacanthus imperator) in Your Saltwater Aquarium

The Emperor Angelfish, scientifically known as Pomacanthus imperator, is a striking marine species sought after by experienced saltwater aquarium enthusiasts. This comprehensive guide provides essential information for those considering the Emperor Angelfish as an addition to their aquarium. We will cover various aspects, including habitat, reef compatibility, size, lifespan, dietary needs in captivity, aquaculture availability, compatibility with other marine species, sexual dimorphism, coloration changes from juvenile to adult, temperament, precise tank requirements, and water conditions. We'll also explore common names for this species and practical reasons to consider purchasing the Emperor Angelfish from Saltwaterfish.com.

Habitat and Natural Range of the Emperor Angelfish

The Emperor Angelfish is native to the warm tropical waters of the Indo-Pacific region. Within this habitat, it frequents coral-rich areas, lagoons, and reef slopes. It often seeks refuge in crevices and caves among the coral formations. To ensure the well-being of your Emperor Angelfish in captivity, it's essential to replicate its natural habitat within the aquarium.

Reef Compatibility of the Emperor Angelfish

While the Emperor Angelfish is a stunning addition to any saltwater aquarium, it is essential to note that it is not considered reef-safe. This species tends to nip at soft and stony corals, which may damage your reef ecosystem. Therefore, careful consideration should be given when introducing this angelfish to a reef environment, and close monitoring is advised.

Size and Lifespan of the Emperor Angelfish

The Emperor Angelfish is a medium-sized angelfish species that can grow up to 15 inches (38 centimeters) in length. In terms of lifespan, well-cared-for specimens can live for 10 to 15 years or more in captivity, making them a rewarding long-term addition to your aquarium.

Diet in Captivity for the Emperor Angelfish

Feeding the Emperor Angelfish in captivity can be a bit challenging. Their diet should be diverse and include:

  • High-Quality Marine Pellets: Incorporate high-quality marine pellets into their daily feeding routine to ensure they receive essential nutrients.
  • Frozen Foods: Supplement their diet with frozen offerings such as brine shrimp, mysis shrimp, and enriched frozen preparations.
  • Live or Fresh Marine Algae: Provide live or fresh marine algae to satisfy their natural herbivorous tendencies. Seaweed sheets are a suitable option.
  • Sponges: Sponges are a significant part of their diet in the wild. In captivity, providing sponge-based foods can help meet this dietary requirement.

Aquaculture and Availability of the Emperor Angelfish

The Emperor Angelfish is unavailable through aquaculture efforts, and most specimens in the aquarium trade are wild-caught. When sourcing these fish, choosing reputable suppliers like Saltwaterfish.com is essential, ensuring the health and well-being of your new addition.

Compatibility with Other Fish and Invertebrates

The Emperor Angelfish can be territorial and aggressive towards other angelfish species, so it's recommended to house them singly or introduce them as a mated pair. Here are five compatible tankmates to consider:

  • Tangs and Surgeonfish (Acanthuridae): Tangs are generally compatible due to their different body shapes and feeding habits.
  • Butterflyfish (Chaetodontidae): Many butterflyfish species coexist well with the Emperor Angelfish, provided they have enough swimming space.
  • Wrasse (Labridae): Wrasses come in various shapes and sizes and can be compatible if chosen carefully.
  • Triggerfish (Balistidae): Certain triggerfish species can share a tank with the Emperor Angelfish, with sufficient space and hiding spots.
  • Damsel Fish (Pomacentridae): Some damselfish species can be compatible, but their temperament may vary.

Sexual Dimorphism in the Emperor Angelfish

The Emperor Angelfish does not exhibit significant sexual dimorphism, making it challenging to distinguish between males and females visually.

Juvenile to Adult Coloration Changes in the Emperor Angelfish

Juvenile Emperor Angelfish have a distinct coloration with a vibrant blue body adorned with vertical yellow stripes. As they mature into adults, their coloration undergoes a dramatic transformation. Adult Emperor Angelfish display a striking blue-black body with bold, concentric white and blue rings extending from their eye to their caudal fin. Their caudal fin features a bright yellow hue, and they have a prominent yellow mask over their eyes.

Tank Requirements for the Emperor Angelfish

To provide the best environment for your Emperor Angelfish, adhere to these tank requirements:

  • Minimum Aquarium Size: A tank with a capacity of at least 120 gallons (400 liters) is recommended for a single Emperor Angelfish. Larger tanks are preferable for providing ample swimming space and territories.
  • Decor and Hiding Places: Incorporate live rock structures, caves, and overhangs to mimic their natural habitat and provide hiding spots.
  • Water Conditions: Maintain stable water conditions with the following parameters:
  • pH: 8.1 to 8.4
  • Salinity: 1.020 to 1.025
  • Water Temperature: 74°F to 78°F (23°C to 26°C)
  • Water Flow: Moderate to strong flow to replicate the conditions on coral reefs.

Common Names for the Emperor Angelfish

The Emperor Angelfish is also known as Imperator Angelfish and Emperor Angel.

Why People Should Buy the Emperor Angelfish from Saltwaterfish.com

Quality Assurance: Saltwaterfish.com is committed to providing top-quality marine life. Each Emperor Angelfish is carefully selected and cared for to ensure its well-being.

Expert Guidance: Saltwaterfish.com offers valuable resources and expert advice to help you create and maintain an ideal aquarium environment for your Emperor Angelfish.

Convenience: With an easy-to-navigate online platform, Saltwaterfish.com offers a secure and convenient way to purchase marine fish and essential aquarium supplies.

Sustainability: Choosing Saltwaterfish.com supports responsible sourcing practices, contributing to conservation efforts and preserving marine ecosystems.

In conclusion, the Emperor Angelfish (Pomacanthus imperator) is a captivating marine species that requires specific care and consideration in a saltwater aquarium. Understanding its natural habitat, dietary needs, and compatibility with other species can create a thriving environment for this remarkable fish. When sourcing an Emperor Angelfish, opt for reputable suppliers like Saltwaterfish.com to ensure the well-being of your new aquatic companion.

Top notch store, every order I get fish are eating within minutes after acclimation. Would order from here before even buying from my local stores.


Reviewed by: Vance Lane on Jan. 23, 2024

The Emperor Angelfish was shipped extremely well, and it was a perfect addition to my reef tank. I acclimated according to the instructions, and I have had no problems with any of the fish I have received. What more can you ask for? Cheaper then my local fish store and it was delivered to my front door the next day.


Reviewed by: Jamison Tillar on Dec. 31, 2021

Beautiful angelfish. I purchased the large juvenile and it arrived healthy and readily accepts frozen & flake food.


Reviewed by: Dennis on Aug. 11, 2018

My first Emperor Angelfish is beautifully patterned and healthy. I feed it a combination of live red tree sponges, prime reef flakes, and dried green seaweed; in addition to these foods it scours my aquarium for all algae. I highly recommend it, especially since it's gotten over being shy.


Reviewed by: Elwood Lester on Sept. 28, 2016

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