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Slippery Dick Wrasse

Halichoeres bivittatus

A marine fish species of the family Labridae, valued by aquarists for its interesting behavior and beautiful coloration.

Family
Labridae
Origin
Oceano Atlantico occidentale, dalla Carolina del Nord (USA) e Bermuda fino al Brasile meridionale.
Origin
Tropical oceans and reefsExtra-Amazon South AmericaNorth America
Tank use
Used in 0 tanks

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Species challenges
Water Temperature

22 °C - 27 °C

pH Value

8.1 - 8.4

Water type

Marine

Tank level

Bottom

Adult size

20 cm

Species description

Geographical Origin and Habitat: Western Atlantic Ocean, from North Carolina (USA) and Bermuda to southern Brazil. 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 20.0 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 66 gallons (approx. 250.0 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. Varied diet: crustaceans, mollusks, polychaete worms, and smaller fish. It is recommended to feed the fish two or three times daily in small portions.

Water Quality: Stable parameters: temperature 22.0-27.0°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. In nature, forms mass spawning aggregations on reef edges. No documented aquarium spawning.

Risks and Diseases: Sensitive to transport stress and high jump risk; requires a tightly fitted aquarium lid.

Fish profile

Temperament
Semi-aggressive
Diet
Carnivorous. Varied diet: crustaceans, mollusks, polychaete worms, and smaller fish.
Tank level
Bottom
Minimum group
1
Adult size
20 cm
Minimum tank volume
250 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. In natura formano gruppi di deposizione di massa sui margini della barriera. Non documentata in acquario.
Compatibility & tankmates
Molto attivo e territoriale da adulto. Può infastidire pesci lenti o timidi e prederà piccoli crostacei.

Ecological Estimates & Biological Models

Trophic level
3.8 ± 0.1 se
Resilience
Medium (1.4 - 4.4 years)
Phylogenetic uniqueness (PD50)
0.5
Bayesian Length-Weight
a = 0.00933, b = 3.07
VulnerabilityLow vulnerability (25 / 100)

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.

Last updated: 06/13/2026