Common name: Saddleback Clownfish

Scientific name: Amphiprion polymnus (Linnaeus, 1758)
Saddleback Clownfish (Amphiprion polymnus) close upSaddleback Clownfish (Amphiprion polymnus)
Saddleback Clownfish (Amphiprion polymnus)Saddleback Clownfish (Amphiprion polymnus) in large anemone

General Information

The Saddleback Clownfish, scientifically known as Amphiprion polymnus, is a charming species known for its distinctive saddle-like white marking across its back. This unique pattern, along with its brown to black body and white face, sets it apart from other clownfish species. The Saddleback Clownfish has become a popular choice for aquarists due to its striking appearance and engaging behavior.

In the aquarium hobby, the Saddleback Clownfish is appreciated not only for its beauty but also for its role in symbiotic relationships with anemones. This species is moderately available in the trade, with both wild-caught and captive-bred individuals offered. Captive-bred specimens are often recommended due to their adaptability and reduced impact on wild populations.

Details

Estimated price
Affordable
Recommended minimum tank volume
100 liter (26 gallons)
Salinity
S.G. 1.023 to 1.026
Temperature
24 to 28 °C (75 to 82 °F)
Acidity
pH 8.1 to 8.4
Average size
12 cm (5″)
Care level
Moderate to easy
Diet
Omnivore Includes marine flakes, pellets, and frozen foods like mysis shrimp
Social
Pair Form monogamous pairs; dominant individual becomes female
Reefsafe
Yes
Aggression
Peaceful Peaceful but can be territorial around anemones
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
    Damselfish
    Pomacentridae
  6. Genus
    Clownfish
    Amphiprion Bloch & Schneider, 1801
  7. Species
    Saddleback Clownfish
    Amphiprion polymnus (Linnaeus, 1758)
  8. Synonyms
    Amphiprion bifasciatus (Bloch, 1792)
    Amphiprion bifasciatus annamensis Chevey, 1932
    Amphiprion intermedius Schlegel & Müller, 1839
    Amphiprion laticlavius Cuvier, 1830
    Amphiprion polynemus (Linnaeus, 1758)
    Amphiprion trifasciatus Cuvier, 1830
    Anthias bifasciatus Bloch, 1792
    Coracinus seu unimaculata Meuschen, 1781
    Coracinus vittatus Gronow, 1854
    Lutjanus jourdin Lacepède, 1802
    Paramphiprion hainanensis Wang, 1941
    Perca polymna Linnaeus, 1758
    Sciaena unimaculata Meuschen, 1781
  9. Source: GBIF | Global Biodiversity Information Facility

Care

Saddleback Clownfish are best kept in aquariums that mimic their natural reef environment. They thrive in tanks with plenty of live rock and hiding places. A tank of at least 100 liters is recommended to provide ample space for swimming and territory establishment. Maintaining stable water conditions with appropriate filtration is crucial for their health.

To enrich their environment, consider adding anemones such as Heteractis crispa or Stichodactyla haddoni, with which they naturally associate. These anemones provide shelter and a sense of security for the clownfish.

Diet and Feeding

In the wild, Saddleback Clownfish are omnivorous, feeding on a mix of algae, plankton, and small invertebrates. In captivity, they should be offered a varied diet that includes high-quality marine flakes or pellets, along with frozen foods like brine shrimp and mysis shrimp. Feeding once or twice daily is sufficient, and care should be taken to avoid overfeeding.

Behavior and Compatibility

Saddleback Clownfish are known for their peaceful temperament, making them suitable for community reef tanks. They can, however, become territorial, especially when establishing a breeding pair or defending their anemone host. It's important to provide enough space to minimize aggression.

They are compatible with a variety of reef-safe fish and invertebrates but should not be housed with overly aggressive species that might intimidate them.

Reproduction

Like many clownfish, Saddleback Clownfish are protandrous hermaphrodites. They form monogamous pairs, with the dominant individual becoming female. Breeding occurs near their host anemone, where the female lays eggs on a flat surface. The male guards and aerates the eggs until they hatch. Raising the fry requires careful attention to diet and water quality.

Symbiosis

The Saddleback Clownfish has a symbiotic relationship with certain sea anemones, notably Heteractis crispa and Stichodactyla haddoni. This relationship provides the clownfish with protection from predators, while the anemone benefits from food scraps and cleaning by the clownfish.

Health and Common Issues

With proper care, Saddleback Clownfish can live for several years in captivity. It's important to maintain high water quality and a balanced diet to prevent common health issues like ich and marine velvet. Quarantine new additions to the tank to reduce the risk of disease.

When selecting a Saddleback Clownfish, look for vibrant colors and active behavior. Avoid individuals with torn fins or signs of disease.

Habitat

The natural habitat of the Saddleback Clownfish includes the shallow coastal waters and lagoons of the Indo-Pacific region, particularly around northern Australia, the Philippines, and Indonesia. They prefer environments with plenty of anemones and live rock, which offer both food and protection.