Saltwater Fish
King Angelfish

Species Description…

Scientific Name: Holacanthus passer
Common Name: King Angelfish
Species Group: Angelfish
Habitat: Reef Safe with Caution
Care Level: Intermediate
Temperament: Aggressive
Diet Type: Omnivore
Role in Aquarium: Showpiece Fish
Max Fish Length: 14 (inches)
Min Aquarium Size: 150 (gallons)
Native Range: Eastern Pacific
Holacanthus passer - King Angelfish

Holacanthus passer (King Angelfish)

Overview

  • Native to the eastern Pacific Ocean, especially common along the coast from the Gulf of California to Peru.
  • Distinguished by vibrant blue, yellow, and white coloration, with a striking vertical white band behind the gills.
  • A visually appealing species, highly prized among marine aquarium hobbyists.
  • Often inhabits coral reefs and rocky shorelines in the wild.

Feeding

  • Primarily omnivorous; diet includes sponges, algae, coral polyps, and small invertebrates.
  • In aquariums, readily accepts flakes, pellets, and frozen marine foods like shrimp and mussels.
  • Supplement diet with algae-based food to promote vibrant coloration and overall health.
  • Regular feeding schedule of two to three times daily is recommended.

Habitat

  • Typically found around rocky reefs and coral formations in depths ranging from shallow waters to approximately 30 meters.
  • Thrives best in aquarium environments that mimic its natural habitat with ample rockwork and hiding places.
  • Prefers stable water parameters with moderate currents.
  • Benefits from spacious tanks to accommodate active swimming behaviors.

Fish Care

  • Optimal water temperature: 72-78°F (22-26°C).
  • Ideal pH level: 8.1-8.4, with a specific gravity of 1.020-1.025.
  • Requires efficient filtration systems and regular maintenance to maintain high water quality.
  • Sensitive to poor water conditions and stress; proper acclimation is essential.

Compatibility

  • Semi-aggressive; suitable for community aquariums with similarly sized or larger, robust species.
  • Can display territorial behavior, especially toward other angelfish or similarly shaped species.
  • Best kept individually or with caution in larger setups to avoid conflicts.

Aquarium Behavior

  • Active and bold swimmer, often observed exploring its territory or patrolling the tank.
  • Can exhibit territoriality, especially when new fish are introduced or during feeding.
  • Providing sufficient space and hiding spots helps minimize aggression and stress.