Common name: rock wrasse

Scientific name: Halichoeres semicinctus (Ayres, 1859)
Yellow and blue wrasse in a rock crevice at Rabida Island, Galapagos, EcuadorThe ornate wrasse (Thalassoma pavo) - colorful fish in the sea. Marine life - fish and algae on the rocks. Underwater photography from snorkeling. Wildlife in the shallow ocean.

General information

The Half-banded Tamarin, scientifically known as Halichoeres semicinctus, is a small and colorful wrasse species that adds both beauty and activity to a saltwater aquarium. This species is known for its distinctive coloration, with males typically displaying a vibrant array of colors including green, yellow, and blue, while females and juveniles are more subdued with a series of white and black bands.

Details

Recommended minimum tank volume
150 liter (40 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
12 cm (5″)
Care level
Moderate to easy May nip at clam mantles
Diet
Carnivore Enjoys mysis and brine shrimp
Social
Solo Territorial, best kept alone
Reefsafe
Yes
Aggression
Semi aggresive Can be territorial
Captive bred
No
Conservation statusSource: IUCN Red List
ExtinctThreatenedLeastConcern

Taxonomy

  1. Kingdom
    Animals
    Animalia
  2. Phylum
    Chordates
    Chordata
  3. Class
    Ray-finned Fishes
    Actinopterygii
  4. Order
    Perch-like Fishes
    Perciformes
  5. Family
    Wrasses
    Labridae
  6. Genus
    Wrasse
    Halichoeres
  7. Species
    rock wrasse
    Halichoeres semicinctus (Ayres, 1859)
  8. Synonyms
    Julis semicinctus Ayres, 1859
    Pseudojulis venustus Jenkins & Evermann, 1889

Care

Half-banded Tamarins are relatively hardy and adaptable to aquarium life. They require a well-established tank with plenty of live rock for hiding and foraging. These wrasses are known for their pest control abilities, as they actively hunt for small invertebrates and parasites, making them beneficial for maintaining a healthy aquarium ecosystem.

Reproduction

In the wild, Halichoeres semicinctus exhibits protogynous hermaphroditism, where individuals start life as females and can change to males as they mature. In the aquarium, breeding these wrasses can be challenging due to their complex social structures and the need for precise environmental conditions.

Habitat

The Half-banded Tamarin is found in the Indo-Pacific region, from the Red Sea and East Africa to the central Pacific. They inhabit coral reefs and rocky substrates, often seen at depths ranging from shallow waters to about 30 meters. In the aquarium, replicating their natural habitat with a variety of live rock formations and a sandy substrate can help promote natural behaviors and overall health.