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

🌊 Marine Data Deficient 🌡️ Tropical

Duskytail grouper

Epinephelus bleekeri Vaillant, 1878
Max Length
76 cm
Max Weight
-
Lifespan
-
Trophic Level
3.9
Depth
30–105 m
Climate
Tropical
Resilience
Low
Vulnerability
60.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Occur on shallow banks, but is not known from well-developed coral reefs and adjacent soft substrate in depths of 30-105 m . Also found in silty coastal reefs and estuaries. Solitary (Ref 90102). Benthic . In Hong Kong live fish markets . Usually taken by trawling in 30-45 m or by hand-lining over rocky banks; not found from coral reefs .

Scientific Name
Epinephelus bleekeri
Authority
Vaillant, 1878
Habitat
Marine
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
DD
Max Length
76 cm
Depth Range
30–105 m
Latitude
17°S – 36°N
Trophic Level
3.9
Resilience
Low
Vulnerability
60.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 11; Dorsal soft rays (total): 16 - 18; Anal spines: 3; Anal soft rays: 8 - 9. Recognized by the bluish lower half of the caudal fin and the lack of spots there compared to the upper half ; characterized further by: generally brown color; head, body and fins with red to dark brown spots; body scales ctenoid, except cycloid scales on nape, thorax and ventrally on abdomen; body with auxiliary scales; elongate body, greatest depth 3.0-3.5 in SL; truncate to slightly rounded caudal fin; short pelvic fins, 1.9-2.4 in head length ; head length 2.4-2.7 times in standard length; interorbital area flat to slightly convex; preopercle angle with 2-9 enlarged serrae, adults with a notch above angle; straight upper edge of operculum; scaly maxilla, reaching to or beyond vertical at rear edge of eye; 2 rows of subequal teeth on midlateral part of lower jaw .: fusiform / normal; Cross section: compressed.

🌀 Behaviour

Behavioural data for Duskytail grouper is currently being reviewed.

🦐 Diet

Diet information for Duskytail grouper is currently being compiled.

🥚 Reproduction

Size at Maturity
36cm TL

🌍 Habitat & Distribution

Marine; demersal; depth range 30 - 105 m . Tropical; 36°N - 17°S, 48°E - 153°E West Pacific: Persian Gulf to Taiwan, Indonesia and the northern coast of Australia.

🌿 Ecology

Zone Preferences
🌊 Marine ⬇️ Benthic
Trophic Level
3.9±0.6
🧍 Solitary

📐 Morphometrics

Length–Weight Relationship: W = 0.01259 × L3.06 (TL)
Max TL
76cm
Dorsal Spines
11
Dorsal Rays
17
Anal Spines
3
Anal Rays
9

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Data Deficient
Assessment Date
2016

📊 Population Risk & Fisheries

Population Resilience
Low
Minimum doubling time
Fishing Vulnerability
60.00/100
High vulnerability
Trophic Level
3.9
Predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Latitude Range
36°N – 17°S
Described By
Vaillant, 1878

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Bleeker's Grouper · Bleeker's Rock Cod · duskytail grouper
🇸🇦Arabic Hamoor · Hamour · Semman Lidden · Siman · هامور داكن الذيل · هامور قاتم الذيل
🌍CES kanic Bleekerův
🇫🇷French Merou demi-deuil · Merou demideuil
🇯🇵Japanese Kitenhata · キテンハタ
🇵🇹Portuguese Garoupa-de-Bleeker
🇪🇸Spanish Mero Medioluto
🌍TGL Kulapo
🌍THA ปลากะรังจุดเหลือง · ปลาเก๋าหางช้อน
🇨🇳Chinese 布氏石斑魚 · 橙色石斑魚 · 石斑 · 紅斑 · 紅點鱠

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 3 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 Duskytail grouper ↗
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.