Encyclopaedia
Eight-line Flasher Wrasse
Paracheilinus octotaenia
Eight-line Flasher Wrasse (Paracheilinus octotaenia): marine reef fish of the family Labridae, prized for its unique husbandry requirements.
- Family
- Labridae
- Origin
- Western Indian Ocean: Red Sea endemic.
- Origin
- Tropical oceans and reefsExtra-Amazon South AmericaSouth and Southeast Asia
- Tank use
- Used in 0 tanks
Share
22 °C - 27 °C
8.1 - 8.4
Marine
Mid-water
10 cm
Species description
Geographical Origin and Habitat: Red Sea. Endemic to this region, inhabiting sandy and rubble outer reef slopes rich in corals between 15 and 40 meters.
Taxonomy and Morphology: Belongs to the family Labridae. Reaches about 10 cm. Slender body and rounded caudal fin with short prolonged rays in males.
Social Behavior: Peaceful swimming fish. Males court females by performing sudden accelerations in mid-water, flashing their colors on and off.
Coloration and Sexual Dimorphism: Stunning coloration: red-orange body crossed by 8 parallel longitudinal electric-blue or metallic-purple stripes. Obvious dimorphism, males are larger and more colorful.
Care, breeding and tankmates
Aquarium Setup: Tank of at least 150 liters (40 gallons) rich in rocks but with plenty of free space in mid-water to allow characteristic courtship dashes.
Diet and Feeding: Carnivore. Offer mysis, brine shrimp, copepods, and enriched dry foods. Feed regularly to support its high metabolism.
Water Quality: Temperature 22-27°C (72-80°F), pH 8.1-8.4, specific gravity 1.020-1.025. Effective skimming and excellent water oxygenation are required.
Compatibility and Cohabitation: 100% reef-safe. Ideal for community reef aquariums. It is recommended to keep them in a harem with one male and multiple females.
Aquarium Breeding: Reproduction is not successfully documented in home aquariums. In the wild, they release free pelagic eggs.
Risks and Diseases: Jumps frequently out of the water if chased or startled. The tank must be perfectly covered with a fine mesh screen.
Fish profile
- Temperament
- Peaceful
- Diet
- Carnivore
- Tank level
- Mid-water
- Minimum group
- 1
- Adult size
- 10 cm
- Minimum tank volume
- 150 L
- GH
- n/a
- KH
- 8 dKH - 12 dKH
- TDS
- n/a
- Conductivity
- n/a
- Sex ratio
- Solitary or in harem (one male, multiple females).
- Feeding frequency
- Feed twice daily.
- Bioload
- Low
- Flow
- Medium
- Jump risk
- Covered tank required
- Reproduction
- Protogynous hermaphrodites. Males display flashes of color during courtship. No captive breeding in aquariums.
- Compatibility & tankmates
- Peaceful. Safe with corals and other calm fish. Best kept as a harem. Avoid keeping with aggressive tankmates.
Ecological Estimates & Biological Models
- Trophic level
- 3.4 ± 0.45 se
- Resilience
- High (less than 15 months)
- Phylogenetic uniqueness (PD50)
- 0.5
- Bayesian Length-Weight
- a = 0.01072, b = 3.03
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.
Related species
Other recommended species with similar care requirements and water parameters.





