Saltcorner
By Bob Goemans
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Thalassoma

Thalassoma lucasanum

(Gill, 1863)

Cortez Rainbow Wrasse

Likely Reef Tank Suitable

Likely Fish-Only Tank Suitable

Range: Eastern Pacific Ocean: Gulf of Californian/Sea of Cortez to Panama and Galapagos Islands.

Size: 6 inches (15 cm)

Natural Environment: Inhabits shallow rocky lagoons and reef areas and usually found at depths between 6 – 85 feet (2 – 25 m) where it feeds on crustaceans/zooplankton.

General Husbandry: Occasionally seen in the trade with the adult male sometimes exhibiting its terminal phase coloring, which has a greenish/reddish/bluish face, a wide yellow vertical bar just aft of the head, with the remaining body reddish with fine vertical white lines.

Because this species is mainly a zooplankton feeder, it can be maintained with peaceful slightly larger tankmates in reef or fish-only aquariums having rocky crevices and caves to hunt and hide in. It will also quickly burrow into the sand bed if frightened, and occasionally for sleeping at night. May search bottom areas for tasty bottom dwelling invertebrates, e.g., ornamental shrimp and snails. Keep in mind those in this genus are highly active swimmers and are constantly on the go.

Requires a meaty diet, including fortified brine shrimp, mysis, and other meaty type marine-based frozen for fresh foods, and should be fed three times daily. Will also accept flake and other dry foods, such as pellet foods.

Taxonomy:

    Order: Perciformes

    Suborder: Labroidei

    Family: Labridae

    Genus: Thalassoma

FYI: Will jump out of uncovered aquariums.

One male per aquarium.

Experience Level: Intermediate

Temperament: Semi-aggressive

Diet: Carnivore

Coral Safe: Yes

Fish Safe: With caution

Invertebrate Safe: With caution

Acclimation Time: 30 minutes+

Aquarium Environment: Reef or fish-only aquarium

Tankmates: Peaceful, yet larger

Minimum Tank Size: 75 gallons

Temperature Range: 74 - 82°F (23 – 27°C)

Specific Gravity: 1.020 - 1.026

pH: 8.0 - 8.5

 Thalassoma lucasanum (Cortez Rainbow Wrasse)
Photo © Bob Fenner
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