Common name: Swallowtail Angelfish

Scientific name: Genicanthus melanospilos (Bleeker, 1857)

General Information

The Swallowtail Angelfish, scientifically known as Genicanthus melanospilos, is a captivating marine species that has gained popularity among aquarium enthusiasts. This species is part of the Genicanthus genus, which is unique among angelfish for its sexually dimorphic traits and relatively peaceful nature. The Swallowtail Angelfish is particularly noted for its striking appearance and adaptability to captive environments, making it a favored choice for both novice and experienced aquarists.

In the wild, these angelfish are found in the Indo-Pacific region, inhabiting coral reefs and lagoons. Their elegant, elongated fins resemble a swallow's tail, contributing to their common name.

Details

Estimated price
Expensive
Recommended minimum tank volume
300 liter (79 gallons)
Salinity
S.G. 1.023 to 1.026
Temperature
24 to 27 °C (75 to 81 °F)
Acidity
pH 8.1 to 8.4
Average size
18 cm (7″)
Care level
Easy
Diet
Omnivore Feeds on zooplankton and algae
Social
Pair Best kept in pairs or small groups to reduce stress
Reefsafe
Yes
Aggression
Peaceful
Captive bred
Yes
IUCN Red List
EX
EW
CR
EN
VU
NT
LC

Taxonomy

  1. Kingdom
    Animals
    Animalia
  2. Phylum
    Chordates
    Chordata
  3. Class
    Ray-finned Fishes
    Actinopterygii
  4. Order
    Perch-like Fishes
    Perciformes
  5. Family
    Angelfishes
    Pomacanthidae
  6. Genus
    Swallowtail Angelfish
    Genicanthus
  7. Species
    Swallowtail Angelfish
    Genicanthus melanospilos (Bleeker, 1857)
  8. Synonyms
    Genicanthus macclesfieldiensis Chan, 1966
    Genicanthus melanospilus (Bleeker, 1857)
    Genicanthus zebra (Lienard) Sauvage, 1891
    Holacanthus macclesfieldiensis (Chan, 1966)
    Holacanthus melanospilos Bleeker, 1857
  9. Source: GBIF | Global Biodiversity Information Facility

Care

Swallowtail Angelfish are relatively easy to care for, provided their environment is well-maintained. They thrive in reef aquariums with plenty of swimming space and live rock for grazing. These angelfish are known for their peaceful temperament, making them suitable for community tanks. They require stable water conditions and a diet rich in marine algae and proteins to maintain their health and vibrant colors.

A tank of at least 300 liters is recommended to accommodate their active swimming habits. The aquarium should be equipped with efficient filtration and water movement to replicate their natural habitat. Adding live rock not only provides grazing opportunities but also offers hiding spots, which can help reduce stress.

Diet and Feeding

In their natural habitat, Swallowtail Angelfish are omnivorous, feeding on zooplankton and algae. In captivity, they should be offered a varied diet that includes high-quality marine flakes, pellets, and frozen foods such as mysis shrimp and brine shrimp. Supplementing their diet with spirulina and other algae-based foods will help mimic their natural diet and support their immune system.

Feed them small portions two to three times a day to ensure they receive adequate nutrition without overloading the tank's filtration system. Observing their feeding behavior can help adjust portions and prevent waste.

Behavior and Compatibility

Swallowtail Angelfish are known for their peaceful demeanor, making them excellent candidates for community tanks. They are generally non-aggressive and can coexist with a variety of other reef-safe fish and invertebrates. However, they may exhibit territorial behavior if housed in overly cramped conditions.

These angelfish are best kept in pairs or small groups, as they form social hierarchies. Providing ample space and hiding spots can help minimize any potential aggression.

Health and Common Issues

Swallowtail Angelfish are hardy and can live for several years with proper care. Maintaining optimal water quality and a balanced diet is crucial for their health. Regular monitoring for signs of stress or disease, such as changes in behavior or appearance, can help prevent common issues.

When selecting a Swallowtail Angelfish, look for individuals with clear eyes, vibrant colors, and active swimming behavior. Avoid fish with visible signs of illness or damage.

Habitat

In the wild, Swallowtail Angelfish are found in the Indo-Pacific, from the Great Barrier Reef to the islands of the central Pacific. They inhabit coral-rich areas and prefer depths ranging from 10 to 50 meters. Their natural environment is characterized by clear, warm waters with abundant coral growth, providing both food and shelter.