Is the Bellus Angelfish completely reef safe?

Yes, unlike many other angelfish, the Bellus Angelfish is a dedicated planktivore. They will not nip at hard corals, soft corals, or clam mantles, making them an excellent choice for full reef setups.

Why do some Bellus Angelfish look blue and others orange?

The species is sexually dimorphic. Females possess pale blue-grey bodies with bold black, white, and blue bands. Males have a greyish base with a striking horizontal orange-yellow stripe.

Can I keep two male Bellus Angelfish together?

No, it is highly discouraged. Males are very territorial towards other Genicanthus males and will fight, often to the death. They should be kept singly or as one male with one or more females.

Why is my new Bellus Angelfish struggling to swim downwards?

This is often a sign of a swim bladder injury resulting from improper decompression when the fish was collected from its deep-water habitat. It is crucial to buy specimens that have been properly acclimatised by the supplier and exhibit neutral buoyancy.

Do Bellus Angelfish need a specialized sponge diet?

No. Unlike large Pomacanthus or dwarf Centropyge angels, Genicanthus angels do not graze on sponges. They thrive on a standard marine diet of small meaty foods like mysis shrimp, enriched brine shrimp, and high-quality pellets.

MarineMarineIntermediate

Bellus Angelfish

Genicanthus bellus

The Bellus Angelfish is a highly sought-after, genuinely reef-safe marine fish renowned for its peaceful temperament and striking sexual dimorphism.

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Ideal Conditions

Temperature: 23 – 27 °C
pH range: 8.1 – 8.4
Hardness: 14 – 22 dGH
Salinity: 1.02 – 1.025 SG
Adult size: 15 – 18 cm
120 gallons: 450 litres+
Lifespan: 10 – 15 years
Diet: omnivore
Water flow: strong
Preferred setup: Spacious aquarium with extensive open water column for active swimming, alongside ample live rock for retreats.

About the Bellus Angelfish

Unlike many angelfish that pose a risk to coral reefs, the Bellus Angelfish (Genicanthus bellus) belongs to a unique genus of mid-water planktivores that completely ignore sessile invertebrates. This species is famous for its dramatic sexual dimorphism, meaning males and females display entirely different colour patterns. Females feature intricate black, white, and pale blue bands, while males sport a grey base with bright orange-yellow stripes. Their elegant, trailing lyretails and graceful swimming style make them a mesmerising centrepiece for large marine aquariums.

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Where Bellus Angelfish comes from

Native range

Western Pacific Ocean, Eastern Indian Ocean

Countries / regions

Indonesia, Philippines, Palau, French Polynesia

Habitat

Deep outer reef slopes and drop-offs, typically at depths of 50 to 100 metres where currents are strong.

Primarily collected from deep water, requiring careful decompression before entering the aquarium trade.

Similar species

Watanabe's Angelfish
Genicanthus watanabei
Lamarck's Angelfish
Genicanthus lamarck
Blackspot Angelfish
Genicanthus melanospilos

We’re adding more full species guides as the catalogue grows.

Compatible tank mates

Reviewed guidance based on this species' recorded traits.

View all compatibility

Lyretail Anthias
Pseudanthias squamipinnis
Anthias share a similar planktivorous diet and appreciate the same open water flow, providing a vibrant, active display without competition.
Great
Yellow Tang
Zebrasoma flavescens
Peaceful herbivorous tangs will not compete for food or territory, coexisting excellently in spacious systems.
Great
Fairy Wrasses
Cirrhilabrus spp.
Fairy wrasses are similarly peaceful, reef-safe mid-water swimmers that complement the Bellus Angelfish perfectly.
Great
Dwarf Angelfish
Centropyge spp.
While usually fine due to different feeding habits, some aggressive dwarf angels may harass a newly introduced Bellus.
Compatible with caution
Other Genicanthus species
Genicanthus spp.
Males of the same genus may show severe territorial aggression towards one another. Only house multiple Genicanthus in very large aquaria.
Compatible with caution
Clown Triggerfish
Balistoides conspicillum
Large, aggressive predators can easily bully or fatally injure the peaceful Bellus Angelfish.
Not recommended

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