Saltwater Fish
Blue Ring Angelfish

Species Description…

Scientific Name: Pomacanthus annularis
Common Name: Blue Ring Angelfish
Species Group: Angelfish
Habitat: Reef Safe with Caution
Care Level: Advanced
Temperament: Semi-aggressive
Diet Type: Omnivore
Role in Aquarium: Showpiece Fish
Max Fish Length: 12 (inches)
Min Aquarium Size: 180 (gallons)
Native Range: Indo-Pacific
Pomacanthus annularis - Blue Ring Angelfish

Pomacanthus annularis (Blue Ring Angelfish)

Overview

  • Native to the Indo-Pacific region, commonly found around coral-rich reefs and rocky structures.
  • Identifiable by its beautiful blue-ringed pattern on a tan or yellowish body, with vibrant blue highlights around the fins and face.
  • Adults and juveniles differ distinctly in coloration; juveniles exhibit black with vertical blue and white stripes.
  • Known for being moderately territorial and showing personality in aquarium settings.

Feeding

  • Primarily omnivorous; diet includes sponges, algae, coral polyps, tunicates, and various invertebrates in the wild.
  • In captivity, accepts a varied diet including frozen foods, angelfish preparations, marine algae sheets, mysis shrimp, brine shrimp, and finely chopped seafood.
  • Requires multiple feedings daily to support growth and maintain vibrant coloration.
  • Include algae and sponge-based foods for nutritional balance and health.

Habitat

  • Prefers spacious aquariums (minimum 180 gallons) with ample swimming room and structured live rock formations.
  • Thrives with plenty of caves and crevices for hiding and territory establishment.
  • Stable, mature aquariums are essential for their long-term health and well-being.
  • Benefits from moderate to strong water circulation and efficient filtration systems.

Fish Care

  • Ideal water temperature: 74-80°F (23-27°C).
  • Recommended pH: 8.1-8.4; specific gravity: 1.020-1.025.
  • Requires consistent water quality with routine water testing and regular water changes.
  • Sensitive to changes in water parameters and susceptible to marine parasites, regular monitoring and prompt intervention necessary.

Compatibility

  • Semi-aggressive species; compatibility with similarly sized fish with matching temperaments.
  • May exhibit territorial behavior, particularly towards other angelfish or similarly patterned species.
  • Not considered reef-safe; may nip at corals, sponges, or ornamental invertebrates.
  • Suitable tank mates include large tangs, wrasses, and other semi-aggressive marine species.

Aquarium Behavior

  • Typically bold and active swimmers, exploring their surroundings regularly.
  • Juveniles tend to be shy and secretive, while adults grow more confident and assertive over time.
  • Often interactive with caretakers, especially during feeding times.
  • Providing adequate hiding spaces and enrichment can reduce territorial aggression and stress.