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

🌿 Sustainable Seafood ⚡ Omega-3 Rankings 🔬 Mercury Safety 🏆 World Records 🎣 Fishing Licenses
API Docs
Get API Key →
🌊 Marine Least Concern 🌡️ Subtropical

Knife-back seabream

Polyamblyodon gibbosum Pellegrin, 1914
← All Species
Max Length
60 cm
Max Weight
-
Lifespan
-
Trophic Level
3.6
Depth
-
Climate
Subtropical
Resilience
Low
Vulnerability
56.00/100
Typical Length
35 cm
Depth Zone
reef

📖 Overview

Caught usually near rocky reefs. Feeds on invertebrates, mainly crustaceans and mollusks. Utilized fresh.

Scientific Name
Polyamblyodon gibbosum
Authority
Pellegrin, 1914
Habitat
Marine
Climate
Subtropical
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
60 cm
Trophic Level
3.6
Resilience
Low
Vulnerability
56.00/100
Salinity
30–40 ppt

🔬 Taxonomy

Genus
Polyamblyodon
Polyamblyodon
Species
Knife-back seabream
Polyamblyodon gibbosum

🐟 Physical Description

Dorsal spines (total): 11; Dorsal soft rays (total): 13; Anal spines: 3; Anal soft rays: 10 - 11. Grey-blue in color.: fusiform / normal.

🌀 Behaviour

Behavioural data for Knife-back seabream is currently being reviewed.

🦐 Diet

Diet information for Knife-back seabream is currently being compiled.

🥚 Reproduction

Reproduction data for Knife-back seabream is currently being compiled.

🌍 Habitat & Distribution

Marine; reef-associated. Subtropical South Africa and Madagascar.

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
3.6±0.5
Food Items

invertebrates, mainly crustaceans and mollusks

📐 Morphometrics

Length–Weight Relationship: W = 0.01259 × L3.03 (TL)
Max TL
60cm
Dorsal Spines
11
Dorsal Rays
13
Anal Spines
3
Anal Rays
11

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2009

📊 Population Risk & Fisheries

Population Resilience
Low
Minimum doubling time
Fishing Vulnerability
56.00/100
High vulnerability
Trophic Level
3.6
Predator
Body Shape
Fusiform / normal
Climate Zone
Subtropical
Described By
Pellegrin, 1914

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Knife-back seabream ↗
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Spotted incorrect or outdated data?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.