Common name: yellow damselfish

Scientific name: Stegastes planifrons (Cuvier, 1830)
Fish Threespot damselfish Stegastes planifronsMature Threespot Damselfish stegastes planifrons hovering over coral
Threespot Damselfish and SpongeThreespot Damselfish

General information

The Bicolor Damselfish, Stegastes planifrons, is a small and vibrant fish that is popular among reef aquarium enthusiasts. It is known for its striking two-tone coloration, with a front half that is a deep blue and a rear half that is a bright yellow or orange. This species is part of the Pomacentridae family, which includes other damselfish and clownfish.

Bicolor Damselfish are hardy and can be a good choice for beginners. However, they can become territorial and aggressive, especially in smaller tanks or when they mature. It's important to consider tank mates carefully and provide plenty of hiding spaces to minimize aggression.

Details

Recommended minimum tank volume
200 liter (53 gallons)
Salinity
S.G. 1.020 to 1.025
Temperature
24 to 28 °C (75 to 82 °F)
Acidity
pH 8.1 to 8.4
Average size
15 cm (6″)
Care level
Moderate to difficult May nip at corals/clams
Diet
Omnivore Algae, small inverts, feed
Social
Harem Aggressive if crowded
Reefsafe
No May nip at corals
Aggression
Semi aggresive Territorial, especially males
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
    Stegastes
  7. Species
    yellow damselfish
    Stegastes planifrons (Cuvier, 1830)
  8. Synonyms
    Eupomacentrus planifrons (Cuvier, 1830)
    Pomacentrus planifrons Cuvier, 1830

Care

Stegastes planifrons requires a well-established aquarium with live rock for grazing and hiding. They are omnivorous and will accept a variety of foods, including frozen and flake foods, but should also be offered algae or vegetable-based foods to mimic their natural diet.

A larger tank is recommended to manage their territorial behavior, and they should be kept with other fish that can hold their own against a feisty damselfish.

Reproduction

Bicolor Damselfish are oviparous, laying eggs that are then fertilized by the male. The male guards the nest and aerates the eggs until they hatch. In the aquarium, breeding can occur if the environment is stable and there are adequate hiding places for the fry.

Habitat

Stegastes planifrons is found in the Western Atlantic, from Florida and the Bahamas to Brazil, including the Gulf of Mexico and the Caribbean Sea. They prefer shallow reefs and are often found in seagrass beds or near coral outcroppings.