Bellus Angelfish - Female

The female Bellus Angelfish is a beautifully patterned saltwater fish with a silvery white to pale blue body, sweeping black horizontal bands, and an intense violet-blue patch across the lower flank. Fine blue edging, warm orange accents along the dorsal and anal fins, and an elegant lyre-shaped tail give this fish a refined appearance under reef aquarium lighting. Females are dramatically different from the more muted, golden-striped males, making them especially desirable display specimens. 

Also known as the Ornate Angelfish or Bellus Lyretail Angelfish, Genicanthus bellus has a localized distribution across the eastern Indian and Pacific oceans, including the Cocos-Keeling Islands, Philippines, Palau, Guam, Tonga, Cook Islands, and Society Islands. It naturally inhabits deep, current-swept outer reef slopes and drop-offs, where it forms small harems and feeds on plankton above the reef.

Unlike most marine angelfish, the Bellus Angelfish is primarily a midwater planktivore rather than a coral grazer. Its peaceful temperament, graceful swimming behavior, and dependable reef compatibility make it an outstanding choice for a large, established reef aquarium or fish-only aquarium. Adults reach approximately 7 inches and require generous open swimming space. 

Quick Care Guide

Care Level: Moderate
Minimum Tank Size: 125 gallons
Temperament: Peaceful
Diet: Planktivore / Omnivore
Reef Safe: Yes
Region: Eastern Indian Ocean and Pacific Ocean
Scientific Name: Genicanthus bellus

Tank Requirements

Provide a mature aquarium with a long swimming footprint and broad, unobstructed areas through the middle and upper water column. Position live rock along the back and sides to create caves, shaded overhangs, and secure nighttime retreats without crowding the primary swimming lanes.

Moderate to strong, varied water movement and excellent oxygenation suit this current-associated species. Efficient filtration is important because the fish should be fed several small meals throughout the day. A sand or fine-gravel substrate is appropriate, although it has no specialized substrate requirement.

Because Bellus Angelfish originate from deeper reef habitats, newly introduced specimens may be uncomfortable under intense lighting. Provide shaded retreats and gradually acclimate the fish to a brightly illuminated reef aquarium. Use a secure mesh cover, particularly during acclimation or territorial disputes. 

A single female can be maintained in a 125-gallon aquarium. A male-female pair or harem requires substantially more room, with approximately 180 gallons or larger providing more appropriate swimming space and separate retreats. 

Diet and Feeding

The Bellus Angelfish is primarily a planktivore that feeds in the water column. In nature, it consumes zooplankton, including small drifting organisms, while also taking limited amounts of algae and benthic invertebrates. 

Offer mysis shrimp, enriched brine shrimp, copepods, finely chopped krill, calanus, small plankton-based frozen foods, chopped clam or shrimp, and high-quality slow-sinking marine pellets. Spirulina-enriched flakes, frozen algae blends, and other vegetable-based foods can be included for dietary variety.

Feed two to three small portions daily, allowing food to remain suspended in the water column where the fish can capture it naturally. Newly introduced specimens may benefit from more frequent small feedings. Confirm that the female is actively eating and maintaining a full body profile, especially when housed with fast, competitive feeders. 

Temperament and Tankmates

The female Bellus Angelfish is generally peaceful and less territorial than many other marine angelfish. Suitable tankmates include tangs, rabbitfish, butterflyfish, peaceful wrasses, clownfish, cardinalfish, anthias, gobies, and other non-predatory community fish.

Keep a single female, a compatible male-female pair, or a carefully planned harem consisting of one male and several females. Do not keep multiple males together in the average home aquarium. When creating a group, provide a substantially larger system and introduce the fish carefully to reduce territorial conflict.

This species is a protogynous hermaphrodite. In the absence of a male, a dominant female may gradually transition into a male and develop the corresponding adult coloration. Bellus Angelfish naturally form harems containing one male and several females. 

Avoid highly aggressive fish that may prevent it from feeding or force it to remain hidden. Large dottybacks, aggressive triggers, predatory groupers, and exceptionally territorial angelfish may be unsuitable companions.

Reef Compatibility

The Bellus Angelfish is considered reef safe. Unlike most angelfish, it feeds primarily on plankton in open water and does not normally graze on healthy stony corals, soft corals, zoanthids, anemones, clam mantles, or other sessile reef animals. 

It is also generally compatible with ornamental shrimp, crabs, snails, and clams. Very small planktonic crustaceans may be consumed as part of its natural feeding behavior, but established ornamental invertebrates are not normally targeted.

Its adult size and active swimming may allow it to dislodge unsecured coral fragments accidentally. Mount frags securely and preserve open routes around larger coral colonies.

Water Parameters

Temperature: 75–79°F
Specific Gravity: 1.024–1.026
pH: 8.1–8.4
Alkalinity: 8–12 dKH

Maintain excellent oxygenation, consistent salinity, and low levels of accumulated waste. Stable conditions are more important than repeatedly adjusting the aquarium to achieve one exact value.

Common Considerations

• Provide extensive swimming space: This active, midwater angelfish reaches approximately 7 inches and should not be confined by dense rockwork.

• Acclimate carefully to bright lighting: Shaded retreats are especially important for newly introduced deepwater specimens.

• Feed several small meals: Its planktivorous feeding style is best supported with frequent portions of suspended marine foods.

• Female coloration may change: A dominant female can transition into male coloration when social conditions trigger a sex change.