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🌊 Marine Least Concern 🐠 Aquarium 🌡️ Subtropical

Blunthead wrasse

Thalassoma amblycephalum Bleeker, 1856
Max Length
16.5 cm
Max Weight
-
Lifespan
-
Trophic Level
3.1
Depth
0–15 m
Climate
Subtropical
Resilience
High
Vulnerability
28.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Occurs in aggregations over shallow lagoon and seaward reefs and on reef flats . Feeds mainly on crustacean zooplankton . Spawns at dusk above reefs . Rarely marketed . Minimum depth reported taken from Ref. 128797.

Scientific Name
Thalassoma amblycephalum
Authority
Bleeker, 1856
Habitat
Marine
Climate
Subtropical
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
16.5 cm
Depth Range
0–15 m
Latitude
32°S – 30°N
Trophic Level
3.1
Resilience
High
Vulnerability
28.00/100
Water Temp
24–28 °C
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 8; Dorsal soft rays (total): 13; Anal spines: 3; Anal soft rays: 10 - 11. Juveniles easily identified by the color pattern and rounded snout. Males become brightly colored and head usually green with a yellow band following on the body . Head naked, no scales dorsally on opercle. Initial phase with a broad blackish stripe from snout through eye to caudal-fin base (Ref 9823).: fusiform / normal; Cross section: compressed.

🌀 Behaviour

Behavioural data for Blunthead wrasse is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous

Oviparous, distinct pairing during breeding .

🌍 Habitat & Distribution

Marine; reef-associated; depth range 0 - 15 m , usually 1 - 15 m . Subtropical; 24°C - 28°C ; 30°N - 32°S South Africa (Ref.

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
3.1±0.2
Food Items

crustacean zooplankton (Ref

📐 Morphometrics

Length–Weight Relationship: W = 0.00933 × L3.06 (TL)
Max TL
16.5cm
Dorsal Spines
8
Dorsal Rays
13
Anal Spines
3
Anal Rays
11

🌡️ 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
High
Minimum doubling time
Fishing Vulnerability
28.00/100
Low vulnerability
Trophic Level
3.1
Predator
Body Shape
Fusiform / normal
Climate Zone
Subtropical
Latitude Range
30°N – 32°S
Described By
Bleeker, 1856

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Bluehead wrasse · Parrotfish · Rainbow Wrasse, Bluntheaded wrasse · Rainbow wrasse · Two-tone wrasse · blunt-headed wrasse · bluntheaded wrasse
🇫🇷French Labre arc-en-ciel
🇯🇵Japanese Kogashirabera · コガシラベラ
🌍TAH po'ou
🇨🇳Chinese 四齒 · 碇仔 · 礫仔 · 鈍吻葉鯛 · 鈍頭葉鯛 · 鈍頭錦魚 · 钝头锦鱼 · 青開叉

Scientific Synonyms

Scientific Name Author Year Status
Julis amblycephalus Bleeker 1856 Synonym
Julis melanochir Bleeker 1857 Synonym
Pseudojulis trifasciatus Weber 1913 Synonym
Pseudojuloides trifasciatus Weber 1913 Synonym
Thalassoma marnae Schultz 1943 Synonym
Thalassoma melanochir Bleeker 1857 Synonym

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 12 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

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