Common name: Cortez rainbow wrasse

Scientific name: Thalassoma lucasanum (Gill, 1862)
Cortez Rainbow Wrasse and Nudibranch encounter, Sacramento, ixtapa, Mexico.A Cortez rainbow wrasse (Thalassoma lucasanum) on a reef in the Gulf of California (Sea of Cortez).

General information

The Mexican Hogfish, Thalassoma lucasanum, is a vibrant and active species that adds both color and dynamic behavior to a saltwater aquarium. Known for its striking appearance, the Mexican Hogfish has a purple head, a yellow body, and a magenta tail, with males often displaying more intense coloration and larger size than females. They are found in the Eastern Pacific region and are a popular choice among aquarists who appreciate their bold personalities.

Details

Recommended minimum tank volume
300 liter (79 gallons)
Salinity
S.G. 1.020 to 1.025
Temperature
22 to 26 °C (72 to 79 °F)
Acidity
pH 8 to 8.4
Average size
25 cm (10″)
Care level
Moderate to easy Needs ample swimming space
Diet
Carnivore Enjoys mysis, brine shrimp
Social
Pair Can be kept in pairs
Reefsafe
Yes
Aggression
Semi aggresive May be territorial
Captive bred
No

Taxonomy

  1. Kingdom
    Animals
    Animalia
  2. Phylum
    Chordates
    Chordata
  3. Class
    Ray-finned Fishes
    Actinopterygii
  4. Order
    Perciformes
    Perciformes
  5. Family
    Wrasses
    Labridae
  6. Genus
    Lunar Wrasse
    Thalassoma
  7. Species
    Cortez rainbow wrasse
    Thalassoma lucasanum (Gill, 1862)
  8. Synonyms
    Julis lucasanus Gill, 1862
    Thalassoma caeruleomarginata Fowler, 1944
    Thalassoma steindachneri Jordan, 1890

Care

Mexican Hogfish are relatively hardy but require a spacious tank to accommodate their size and active swimming habits. They can grow up to 30 centimeters (12 inches) in length, so a larger tank is necessary. These fish are not reef-safe as they have a tendency to nip at small invertebrates and may eat ornamental shrimp and crabs. A varied diet of meaty foods such as shrimp, squid, and fish flesh is essential for their health.

Reproduction

In the wild, Mexican Hogfish are protogynous hermaphrodites, meaning they start life as females and can change to males as they mature. In the aquarium, breeding is rare, but understanding their reproductive behavior can help in managing social dynamics within the tank.

Habitat

Native to the rocky reefs and slopes of the Eastern Pacific, from the Gulf of California to Peru, including the Galapagos Islands, Mexican Hogfish are typically found at depths ranging from 3 to 30 meters. They prefer environments with plenty of hiding places and open swimming areas.