Common name: Alexander's damsel

Scientific name: Pomacentrus alexanderae Evermann & Seale, 1907

General information

Alexandera's Damsel, scientifically known as Pomacentrus alexanderae, is a small and vibrant member of the damselfish family. This species is named after ichthyologist Helen K. Larson's mother, Alexandera. It is not as commonly found in the aquarium trade as other damselfish but is gaining popularity due to its striking appearance and interesting behavior.

Details

Recommended minimum tank volume
75 liter (20 gallons)
Salinity
S.G. 1.020 to 1.025
Temperature
24 to 27 °C (75 to 81 °F)
Acidity
pH 8.1 to 8.4
Average size
9 cm (3½″)
Care level
Moderate to easy
Diet
Omnivore
Social
School
Reefsafe
Yes
Aggression
Peaceful
Captive bred
No

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
    Damselfish
    Pomacentrus
  7. Species
    Alexander's damsel
    Pomacentrus alexanderae Evermann & Seale, 1907

Care

Alexandera's Damsel is a hardy species that can adapt to a variety of tank conditions, making it suitable for both novice and experienced aquarists. They thrive in well-established aquariums with plenty of live rock for hiding and grazing. While they are generally peaceful, they can become territorial, especially towards conspecifics or similar-sized fish. A varied diet of meaty foods and herbivore preparations will help maintain their health and coloration.

Reproduction

Like many damselfish, Alexandera's Damsel is an oviparous species, with distinct pairing during breeding. They lay eggs on a flat surface, which are then guarded and aerated by the male until they hatch. Breeding in captivity can be achieved with careful attention to water quality and diet.

Habitat

Alexandera's Damsel is native to the Western Pacific, where it is typically found in shallow, coral-rich areas and lagoons. They are often observed in small groups or pairs and can be found at depths ranging from the surface to about 12 meters.

Geographical distribution includes areas such as the Philippines, Indonesia, and the Solomon Islands, where they contribute to the biodiversity and complexity of coral reef ecosystems.