Encyclopaedia
Half-banded Wrasse
Halichoeres semicinctus
A marine fish species of the family Labridae, valued by aquarists for its interesting behavior and beautiful coloration.
- Family
- Labridae
- Origin
- Oceano Pacifico orientale, da Point Conception (California) fino al Golfo di California.
- Origin
- Tropical oceans and reefsExtra-Amazon South AmericaNorth America
- Tank use
- Used in 0 tanks
Share
16 °C - 22 °C
8.1 - 8.4
Marine
Bottom
28 cm
Species description
Geographical Origin and Habitat: Eastern Pacific Ocean, from Point Conception (California) to the Gulf of California. Typically found in shallow waters and reef areas rich in hiding places.
Taxonomy and Morphology: Belongs to the family Labridae. Characterized by a body structure adapted to its active lifestyle, showing bright coloration. Size up to 28.0 cm.
Social Behavior: Active species with a semi-aggressive temperament. Shows moderate to high territorial habits depending on sex and population density.
Coloration and Sexual Dimorphism: Males and females display visible differences in color pattern and vibrancy, especially during the courtship phase.
Care, breeding and tankmates
Aquarium Setup: Requires a marine tank of at least 92 gallons (approx. 350.0 liters), decorated with live rocks to provide natural shelter. For sand-dwelling wrasses, a fine sand bed of at least 2-3 inches (5-8 cm) is essential.
Diet and Feeding: Carnivorous. Feeds on shelled crustaceans, sea urchins, mollusks, and shrimp. It is recommended to feed the fish two or three times daily in small portions.
Water Quality: Stable parameters: temperature 16.0-22.0°C, pH 8.1-8.4, SG stable between 1.020 and 1.025. Monitored nitrates and phosphates.
Compatibility and Cohabitation: Compatible with reef fish. Avoid housing with larger predators or highly aggressive tankmates.
Aquarium Breeding: Protogynous hermaphrodite. Males defend temporary spawning territories. No records of aquarium reproduction.
Risks and Diseases: Sensitive to transport stress and high jump risk; requires a tightly fitted aquarium lid.
Fish profile
- Temperament
- Semi-aggressive
- Diet
- Carnivorous. Feeds on shelled crustaceans, sea urchins, mollusks, and shrimp.
- Tank level
- Bottom
- Minimum group
- 1
- Adult size
- 28 cm
- Minimum tank volume
- 350 L
- GH
- n/a
- KH
- n/a
- TDS
- n/a
- Conductivity
- n/a
- Sex ratio
- Singolo
- Feeding frequency
- Giornaliera
- Bioload
- High
- Flow
- Medium
- Jump risk
- Covered tank required
- Reproduction
- Ermafrodita protogino. I maschi difendono territori di riproduzione temporanei. Non riprodotto in acquario.
- Compatibility & tankmates
- Non reef-safe con piccoli invertebrati. Può spostare rocce e detriti alla ricerca di prede.
Ecological Estimates & Biological Models
- Trophic level
- 3.3 ± 0.39 se
- Resilience
- Medium (1.4 - 4.4 years)
- Phylogenetic uniqueness (PD50)
- 0.5
- Bayesian Length-Weight
- a = 0.01, b = 3.09
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.





