New 🐟 Mercury Safety Guide & Omega-3 Rankings Updated for 2026. View Omega-3 Rankings →

🌊 Marine Least Concern 🌡️ Tropical

Rockmover wrasse

Novaculichthys taeniourus Lacepède, 1801
Novaculichthys Taeniourus (Novaculichthys taeniourus)
Novaculichthys Taeniourus (Novaculichthys taeniourus)
Max Length
30 cm
Max Weight
-
Lifespan
-
Trophic Level
3.3
Depth
3–25 m
Climate
Tropical
Resilience
Medium
Vulnerability
33.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Inhabit semi-exposed reef flats and lagoon and seaward reefs . Common in areas of mixed sand, and rubble that are subject to mild surge . Benthopelagic . Juveniles shallow on rubble amongst large bommies or protected open patches on reef crests and swim as if were a leaf floating along the bottom; large adults move along over large reef section, usually in pairs and typically turn or shift large pieces of rubble or debris that they grab and pull with their mouth or push over with their snout. Often, while one works the piece, the other grabs exposed prey. They are sometimes called rock-mover wrasse, but they don't move real rocks . Highly territorial . Feed on mollusks, sea urchins, brittle stars, polychaetes, and crabs ; feeding is done by overturning large rocks to expose target preys. The young imitate drifting masses of algae . Marketed fresh . Minimum depth reported from Ref. 30874.

Scientific Name
Novaculichthys taeniourus
Authority
Lacepède, 1801
Habitat
Marine
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
30 cm
Depth Range
3–25 m
Latitude
30°S – 30°N
Trophic Level
3.3
Resilience
Medium
Vulnerability
33.00/100
Water Temp
24–28 °C
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 9; Dorsal soft rays (total): 12 - 13; Anal spines: 3; Anal soft rays: 12 - 13. Juveniles have long extended dorsal fin spines .: fusiform / normal; Cross section: compressed.

🌀 Behaviour

Behavioural data for Rockmover wrasse is currently being reviewed.

🦐 Diet

Diet information for Rockmover wrasse is currently being compiled.

🥚 Reproduction

🐣 Oviparous

Oviparous, distinct pairing during breeding .

🌍 Habitat & Distribution

Marine; reef-associated; depth range 3 - 25 m , usually ? - 14 m . Tropical; 24°C - 28°C ; 30°N - 30°S, 32°E - 77°W South Africa (Ref.

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
3.3±0.4
Food Items

mollusks, sea urchins, brittle stars, polychaetes, and crabs (Ref

📐 Morphometrics

Length–Weight Relationship: W = 0.01479 × L3.04 (TL)
Max TL
30cm
Dorsal Spines
9
Dorsal Rays
13
Anal Spines
3
Anal Rays
13

🌡️ Water Parameters & Tolerance

Temperature Range
24–28°C
Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2009

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
33.00/100
Low vulnerability
Trophic Level
3.3
Predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Latitude Range
30°N – 30°S
Described By
Lacepède, 1801

🌐 Names & Taxonomy

Scientific Synonyms

Scientific Name Author Year Status
? taeniorus Lacepède 1801 Synonym
? taeniurus Lacepède 1801 Synonym
Hemipteronotus taeniourus Lacepède 1801 Synonym
Hemipteronotus taeniurus Lacepède 1801 Synonym
Julis bifer Lay & Bennett 1839 Synonym
Julis vanikorensis Quoy & Gaimard 1834 Synonym
Labrus taeniours Lacepède 1801 Synonym
Labrus taeniourus Lacepède 1801 Homotypic
Novacula cephalotaenia Bleeker 1854 Synonym
Novacula hoedtii Bleeker 1856 Synonym
Novaculichthys bifer Lay & Bennett 1839 Synonym
Novaculichthys taeniorus Lacepède 1801 Synonym
Novaculichthys taeniurus Lacepède 1801 Synonym
Novaculichtys taeniorus Lacepède 1801 Synonym
Noviculichthys taeniourus Lacépède 1801 Synonym
Sparus brachion Lacépède 1802 Synonym
Sparus hemisphaerium Lacépède 1802 Synonym
Xyrichthys altipinnis Rüppell 1835 Synonym
Xyrichthys taeniouris Lacepède 1801 Synonym
Xyrichthys vanikolensis Valenciennes 1840 Synonym
Xyrichtys taeniourus Lacépède 1801 Synonym

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 17 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Rockmover wrasse ↗
Suggest an Edit

Spotted incorrect or outdated data? Submit a correction and our editorial team will review it. Approved edits go live within 48 hours.

Link to a scientific paper, FishBase, or other authoritative source
Report an Issue

Found a factual error, broken data, or inappropriate content? Let us know and we will investigate promptly.