Multicolour Wrasse (Halichoeres iridis)

Multicolour Wrasse (Halichoeres iridis)

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Species Name:

Halichoeres iridis (Radiant Wrasse)

General Information:

Halichoeres iridis, or the Radiant Wrasse, is a species of saltwater fish belonging to the family Labridae. They are known for their vibrant colors and active behavior, making them popular choices for marine aquarium enthusiasts.

Tank Requirements:

  • Tank Size: A minimum tank size of 30 gallons is recommended for a single Radiant Wrasse. Larger tanks are necessary for multiple individuals or if you plan to keep other fish species.
  • Water Parameters:
    • Temperature: 72-78°F (22-26°C)
    • pH: 8.1-8.4
    • Salinity: 1.020-1.025
  • Substrate: Fine sand substrate is preferred, as Radiant Wrasses like to bury themselves during the night.


Halichoeres iridis are carnivorous and should be fed a varied diet consisting of:

  • High-quality marine-based flakes or pellets
  • Frozen or live foods such as brine shrimp, mysis shrimp, and small crustaceans
  • Occasional offerings of chopped seafood, like shrimp or squid, can also be provided

Tank Compatibility:

  • Aggression: Radiant Wrasses can be aggressive towards smaller, more passive fish, especially if the tank is too small or lacks hiding spots.
  • Tankmates: They can be kept with other semi-aggressive to aggressive fish species, but caution should be exercised when introducing them to the tank. Avoid housing them with overly territorial or aggressive fish.
  • Reef Compatibility: Radiant Wrasses are generally considered reef-safe and will not harm corals or invertebrates. However, they may consume small ornamental shrimp.

Behavior & Temperament:

  • Active Swimmers: Radiant Wrasses are active swimmers and appreciate plenty of open space for swimming.
  • Burrowing Behavior: They exhibit burrowing behavior, often digging themselves into the substrate to sleep or hide when stressed.
  • Jumping: Like many wrasse species, Radiant Wrasses are known to jump, so a tightly secured lid is necessary to prevent them from escaping the tank.

Tank Environment:

  • Rockwork: Provide plenty of live rock formations with caves and crevices for hiding and exploration.
  • Plants: While not necessary, live rock with algae growth can provide a natural food source and encourage natural behaviors.
  • Lighting: Moderate to high lighting is preferred, as it mimics their natural reef habitat.


  • Water Quality: Regular water testing and maintenance are crucial to ensure stable water parameters. Perform regular water changes to maintain water quality.
  • Substrate Maintenance: Stir the sand bed occasionally to prevent anaerobic pockets from forming.

Health Considerations:

  • Quarantine: Quarantine new arrivals before introducing them to the main tank to prevent the spread of diseases.
  • Parasites: Keep an eye out for signs of parasites, such as white spots or abnormal behavior. Treat promptly if necessary.
  • Stress: Ensure the tank environment is not causing undue stress, as stress can weaken the immune system and make the fish more susceptible to diseases.


Halichoeres iridis, the Radiant Wrasse, is a colorful and active addition to a marine aquarium. With proper care, a suitable tank environment, and a varied diet, they can thrive and become a captivating centerpiece in your reef or fish-only setup. Remember to provide ample space, appropriate tankmates, and regular maintenance to ensure the health and well-being of your Radiant Wrasse.