Mexican Wrasse Thalassoma Lucasanum

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Mexican Wrasse (Thalassoma lucasanum)

Overview

The Mexican Wrasse, also known as the Cortez Rainbow Wrasse, is a vibrant and active marine fish prized for its electric green, blue, and yellow coloration and dynamic swimming behavior. Energetic and hardy, it brings lively movement and eye-catching color to reef and community aquariums.

Origin

Native to the Eastern Pacific, including the Gulf of California and coastal waters of Mexico, Thalassoma lucasanum inhabits coral reefs, rocky slopes, and sandy lagoons where it actively forages for small invertebrates.

Feeding

A carnivore that thrives on frozen mysis, brine shrimp, chopped seafood, and high-quality marine pellets. Feed 2–3 times daily to maintain vibrant coloration and health.

Tank Mates

Peaceful to semi-aggressive. Best kept with other robust community fish such as tangs, angels, and larger Wrasses. Avoid small ornamental invertebrates or very passive fish that may be stressed by its active swimming.

Aggression

Semi-aggressive. Males may establish small territories in confined tanks. Provide plenty of swimming space, rockwork, and open areas for activity.

Experience Level

Recommended for intermediate aquarists. Hardy and adaptable once acclimated, but requires a mature system with stable water parameters and adequate space.

Water Parameters

• Temperature: 75°F – 82°F (24°C – 28°C)

• Salinity: 1.020 – 1.025 SG

• pH: 8.1 – 8.4

• Alkalinity: 8 – 12 dKH

Colorful, energetic, and robust, the Mexican Wrasse is an excellent choice for aquarists looking for a lively centerpiece or active addition to a reef or community aquarium.

Above images for illustration purposes only. Exact colours, patterns, and size may vary between individuals.

Please note: The livestock that is sold on our online site is not held in store at our Swell shop, or available for collection from the shop. Species sold at our Swell store will differ from ones available to order to your door.

All livestock deliveries are subject to our full Delivery Terms & Conditions, please read before ordering.