Blue Filamented Flasher Wrasse

The Blue Filamented Flasher Wrasse (Paracheilinus cyaneus) is a brilliantly colored and highly active reef fish known for its striking courtship displays. This species is a favorite among aquarists due to its vibrant hues and peaceful nature, making it a great addition to reef tanks.

(REEF SAFE / INTERMEDIATE)

Essential Information:

• Common Names: Blue Filamented Flasher Wrasse, Filamented Wrasse, Cyaneus Flasher Wrasse
• Scientific Name: Paracheilinus cyaneus
• Family: Labridae
• Origin/Habitat: Native to the Indo-Pacific, found in coral reefs and outer reef slopes.
• Maximum Size: Up to 4 inches (10 cm)
• Lifespan: Typically 5–7 years with proper care
• Level of Difficulty: Intermediate; requires a well-established tank with stable water conditions.

Appearance & Physical Traits:

• Coloration & Pattern: Males display electric blue, orange, and red hues with extended filament-like dorsal fins, especially during courtship. Females are more subdued in color.
• Body Shape & Structure: Slender and elongated body designed for quick, darting movements.

Habitat & Environmental Needs:

• Minimum Tank Size: 40 gallons (150 liters) or larger.
• Water Temperature: Maintain between 74°F and 80°F (23°C to 27°C).
• pH Level: Keep between 8.1 and 8.4.
• Specific Gravity: Optimal range is 1.023 to 1.025.
• Aquascape: Provide plenty of live rock for hiding spots and open swimming space. A secure lid is essential, as they are known jumpers.

Diet & Feeding:

• Diet Type: Carnivorous
• Preferred Foods: Frozen or live mysis shrimp, brine shrimp, copepods, and high-quality marine pellets.
• Feeding Frequency: Feed 2–3 times daily in small amounts.

Behavior & Compatibility:

• Temperament: Peaceful and social but may become territorial with other wrasses.
• Social Behavior: Best kept in small harems (one male with multiple females) to encourage flashing displays.
• Tank Mate Compatibility: Compatible with most peaceful reef fish; avoid overly aggressive species.
• Activity Level: Highly active and constantly swimming, especially in the mid-to-upper water column.

Care Considerations & Additional Notes:

• Ease of Care: Requires a mature aquarium with stable conditions and a varied diet.
• Special Requirements: A tight-fitting lid is necessary to prevent jumping.
• Breeding Info: Difficult to breed in captivity; males perform elaborate courtship displays to attract females.
• Additional Notes: The Blue Filamented Flasher Wrasse is reef-safe and does not pose a threat to corals or invertebrates. Keeping a male with females will encourage the most vibrant coloration and flashing behavior.