Description
Red Sea Regal Angelfish – Pygoplites diacanthus
Pygoplites diacanthus, commonly known as the Regal Angelfish, is one of the most iconic and visually striking angelfish in the reef aquarium hobby. The Red Sea variant is especially sought after for its richer coloration and superior hardiness compared to Indo-Pacific counterparts. This species is instantly recognizable by its bold vertical striping in electric blue and white, vibrant yellow to orange flanks, and distinctive dark facial mask. Elegant yet commanding in presence, the Regal Angelfish is a true centerpiece fish that rewards patience and proper care with unmatched beauty.
Origin: Red Sea (Indian Ocean)
Depth: 1–60 m (3–200 ft)
Lighting: Moderate; coloration remains vivid under standard reef lighting
Flow: Moderate; prefers calm to moderately moving water similar to reef slopes and drop-offs
Tank Placement: Mid to lower regions of the aquarium; frequently weaves through rockwork and caves
Temperature: 75–80°F (24–27°C)
Salinity: 1.023–1.026 SG
pH: 8.1–8.4
Diet: Omnivorous – feeds on sponges, tunicates, and benthic organisms in the wild; in captivity requires a varied diet including angelfish-specific preparations, mysis shrimp, sponge-based frozen foods, and high-quality pellets
Temperament: Peaceful to semi-aggressive; generally non-territorial but may show dominance toward similar angelfish species
Size: Up to 25 cm (10 inches)
Care Level: Advanced – sensitive during acclimation and requires a mature, well-established aquarium with ample rockwork (minimum 500 L / 130 gal recommended)
Compatibility: Reef-safe with caution; generally safe with SPS and soft corals but may nip at LPS, zoanthids, and clam mantles
