The Red-Margined Fairy Wrasse (Cirrhilabrus rubrimarginatus), also known as the Pink-Margin Fairy Wrasse, is a vibrant marine fish celebrated for its striking coloration and active demeanor. Originating from the Western Pacific, it is a favored choice among reef aquarium enthusiasts.
Key Information
• Small fish safe: ✅ Yes
• Small invert safe: ⚠️ With caution
• Coral safe: ✅ Yes
• Minimum tank size: 400 liters (106 gallons)
• Adult size: Up to 12 cm (4.7 inches)
• Diet: Carnivorous, primarily feeding on zooplankton.
• Be aware of: Known to jump, so a secure lid is essential; may exhibit territorial behavior, especially towards similar species.
Appearance and Coloration
The Red-Margined Fairy Wrasse displays sexual dimorphism, with distinct differences between males and females:
• Males: Exhibit a pink body with red margins on the dorsal and caudal fins. The scales along the sides are adorned with red dots, and the face features contrasting yellow lines and dashes.
• Females and Subterminal Males: Maintain a pink and yellow appearance, gradually developing the characteristic red margins on the fins.
These vibrant colors make it a standout addition to marine aquariums.
Natural Habitat and Behavior
In the wild, Red-Margined Fairy Wrasses are found across the Western Pacific, from Japan through the Philippines, Palau, Indonesia, Vanuatu, Fiji, and Tonga. They inhabit reef environments, often residing in small groups. As protogynous hermaphrodites, they can change sex from female to male, a trait common among many wrasse species.
Tank Requirements and Water Parameters
To ensure the well-being of the Red-Margined Fairy Wrasse in captivity:
• Minimum Tank Size: A 106-gallon (400 liters) aquarium is recommended to provide ample space.
• Water Parameters:
• Temperature: 24°C – 27°C (75°F – 81°F)
• pH: 8.1 – 8.4
• Specific Gravity: 1.020 – 1.025
• Aquascaping: Provide ample live rock to create hiding spots and foraging areas, mimicking their natural reef habitat.
• Lighting: Moderate lighting is suitable.
• Water Movement: Moderate flow to simulate their natural environment.
Maintaining stable water conditions and high water quality is crucial for their health. A mature, well-established aquarium will support their natural behaviors and provide necessary shelter.
Diet and Feeding
Red-Margined Fairy Wrasses are carnivorous and adapt well to captive diets:
• Diet: Offer a varied diet consisting of:
• Vitamin-enriched frozen mysis shrimp
• Vitamin-enriched frozen brine shrimp
• Other meaty foods
• High-quality marine flake and pellet food
Feeding small amounts multiple times a day can help maintain their energy levels and vibrant coloration.
Compatibility and Social Structure
Red-Margined Fairy Wrasses are generally peaceful but can exhibit territorial behavior, especially towards similar species:
• Social Structure: Best kept singly or in a male-female pair unless in a very large aquarium where multiple individuals can establish territories.
• Temperament: May act aggressively towards other wrasses or similar-shaped fish, especially if inadequately fed or if the habitat lacks hiding places.
• Compatible Tank Mates: Suitable companions include peaceful community fish such as gobies, blennies, and other non-aggressive wrasses. Caution is advised when housing with other wrasses or species with similar coloration.
Observing their interactions and providing ample space can help mitigate aggressive behaviors. Due to their territorial nature, they should be housed with non-aggressive tank mates to prevent stress.
Important Considerations
• Reef Compatibility: Considered reef-safe, they should leave corals and other beneficial invertebrates alone.
• Acclimation: They may be shy upon introduction but typically become more confident over time.
• Health: Ensure a varied diet and stable water conditions to prevent common health issues.
• Jumping Behavior: Known to be jumpers, so a covered aquarium is essential to prevent escape.
With proper care and attention to their specific needs, Red-Margined Fairy Wrasses can be a vibrant and beneficial addition to a marine aquarium.