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Common Name: Blue Ring Angelfish
Other Names: Annularis Angelfish, Blue King Angelfish
Scientific Name: Pomacanthus annularis

Description:
The Blue Ring Angelfish is a large, brightly colored saltwater fish native to the Indo-Pacific region, especially around coral reefs in the Indian Ocean. They are recognized by their golden-orange body with distinctive electric-blue rings. These fish are omnivores, eating sponges, algae, tunicates, and small invertebrates in the wild. In aquariums, they require a varied diet of frozen foods, spirulina, and sponge-based angelfish preparations. They can grow up to 12–18 inches long, making them a large species that requires a very spacious tank

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Gouramis are peaceful and can do well with semi-aggressive fish in a large enough tank.

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1. What fish does your fish typically get along with?

1) Gouramis

Larger tetras (like black skirt tetras)

Mollies

Platies

Cory catfish

2. Is your fish aggressive, semi-aggressive, passive, or a community type of fish?

Semi-aggressive (can be peaceful when young, but territorial as they mature

Not required, but they can be kept in pairs or small groups in a large tank.

avoid very small fish (like guppies or neon tetras) that they may eat.

Avoid aggressive species (like cichlids or tiger barbs) that may fight with them.

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Fish Compatibility - EX: Black Skirt Tetras

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Fish Compatibility - EX: Black Skirt Tetras

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Black skirt tetras are a larger, active fish that can hold their own and are less likely to be eaten by a semi-aggressive fish.

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Mollies are peaceful and hardy fish that can coexist well with a semi-aggressive species.

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1) Tell me about the water that your fish lives in. Is it fresh or saltwater?

The blue angelfish is a saltwater fish. There are both freshwater and saltwater angelfish species, but the Holacanthus bermudensis (Blue Angelfish) and its close relative, the Queen Angelfish (Holacanthus ciliaris), are marine species native to the Western Atlantic Ocean.

2) What are some things that you need to know about this type of water? List 3 facts that you find out about it.

Habitat and Hiding: Blue angelfish live in and around coral reefs. They are a benthic species, meaning they live near the ocean floor. They gracefully swim around the reef during the day and seek shelter and hiding spots within the coral at night to sleep.

Temperature and pH: Blue angelfish thrive in warm, tropical water. The typical temperature range for their habitat is 70-82°F (21-27°C), with a stable pH level of 8.0-8.5.

Diet: In their natural habitat, they are omnivores that primarily feed on sponges (up to 95% of their diet), along with other invertebrates like tunicates, corals, and algae. Juveniles also act as "cleaner fish," removing parasites from other fish.

3) How much space does that fish usually have in its natural environment?

In their natural environment, blue angelfish are often found living in pairs or as part of a harem (one male with several females). They establish and defend a territory on the coral reef. These territories can be quite large, with some sources comparing the size to a small room or even a two-car garage. They need ample space to roam, establish a territory, and find food, which is why a large tank is required for them in captivity

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What type of decor do you want to have in your aquarium?

For a blue angelfish, you'll want decor that mimics their natural coral reef environment. This includes:

Live Rock: Essential for biological filtration and creating hiding spots.

Corals (Live or Artificial): These add vibrant color and provide structure.

Sand Substrate: A marine sand bed is common for reef tanks and helps maintain water chemistry.

Hiding Places: Caves and crevices created by the rock are crucial for this territorial fish.

2) What are the typical costs of these items if you have to purchase them?

Live Rock: Typically ranges from $5 to $15 per pound.

Live Corals: Can cost anywhere from $10 to over $500, depending on the species.

Artificial Corals: Usually range from $10 to $100+.

Marine Sand: A 20lb bag can cost $20 to $40.

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1) What is tank lighting used for/its purpose?

Lighting is used to support the life of corals and algae through photosynthesis, regulate the fish's natural day/night cycle, and make the tank visually appealing.

2) Do you need tank lighting?

Yes, tank lighting is necessary for a healthy, thriving reef aquarium.

How often should you leave the light on? It is recommended to have the lights on for 8 to 12 hours per day using a timer for a consistent schedule.

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Live Sand (Aragonite): This is a fine, white sand that helps maintain the high pH of saltwater.

Cost: Approximately $1.00 - $2.00 per pound.

Total for a large tank (125+ gallons): Could be $125 to $360 or more.

Crushed Coral: This has larger, heavier grains and also helps maintain pH.

Cost: Approximately $0.50 - $1.50 per pound.

Total for a large tank (125+ gallons): Could be $60 to $270 or more.

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1) What is the purpose of a hood cover/what does it do? A hood cover prevents fish from jumping out of the tank, reduces water evaporation, and often houses the lighting fixture.

2) Do you need a hood cover? Yes, it is highly recommended to have a hood cover for a saltwater tank to prevent fish escapes and maintain stable water parameters.

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What is the temperature of your fish's natural environment? The natural environment for a blue angelfish is warm, tropical water with a temperature range of 70-82°F (21-27°C).

2) Do you think you will need a water heater? Yes, a water heater is necessary to maintain a stable and consistent temperature for your blue angelfish.

What is the average cost based on the amount of gallons your blue angelfish needs? For a large tank (125-180 gallons), a suitable heater or combination of heaters can cost on average $50 to $150 or more.

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1) What type of filter do you think your tank/this fish will need?

For a blue angelfish, you will need a robust filtration system that includes several components:

Biological Filtration: The primary biological filtration will be provided by your live rock and sand bed. These are crucial for a saltwater tank.

Mechanical/Chemical Filtration: A canister filter or a large hang-on-back (HOB) filter can be used to handle mechanical (removing debris) and chemical (using media like activated carbon) filtration.

Protein Skimmer: This is an essential piece of equipment for a saltwater tank. A protein skimmer removes dissolved organic waste from the water, which helps prevent nitrate buildup and keeps the water clean and stable for your angelfish.

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What size tank does this fish typically need to feel happy and not stressed?

The blue angelfish requires a very large tank to feel happy and not stressed.

A juvenile blue angelfish can live temporarily in a smaller tank, but a full-grown adult will need a minimum of 125 gallons.

For long-term health and to accommodate their large size and territorial nature, a tank of 180 gallons or more is highly recommended. This provides enough space for them to swim and to establish their own territory without feeling stressed.

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1) How does your fish get air? Blue angelfish get air by extracting dissolved oxygen from the water using their gills.

2) Is there anything specific you need to add to your tank for them to get air? Yes. To ensure enough oxygen is in the water, you need strong water movement and surface agitation from a powerful filter, powerheads, and a protein skimmer.

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The tank setup is chosen to match the blue angelfish's needs as a large, semi-aggressive saltwater fish from a coral reef. The large tank, live rock, and specialized equipment are all necessary to create a stable, natural environment that prevents stress and ensures its health.

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