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Diadromous Least Concern 🌡️ Tropical

Coitor croaker

Johnius coitor Hamilton, 1822
Max Length
16 cm
Max Weight
-
Lifespan
-
Trophic Level
3.4
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
17.00/100
Typical Length
13 cm
Depth Zone
demersal

📖 Overview

Coitor croaker (Johnius coitor), first described by Hamilton, 1822 is a medium-sized fish in the family Sciaenidae (order Perciformes). Adults typically reach 16.00 cm in maximum length. It is diadromous, migrating between freshwater and marine environments during its life cycle. It occurs in Tropical waters. It feeds on a mix of small fish and invertebrates as a mid-level predator. On the IUCN Red List, it is classified as Least Concern.

Scientific Name
Johnius coitor
Authority
Hamilton, 1822
Habitat
Diadromous
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
16 cm
Trophic Level
3.4
Resilience
High
Vulnerability
17.00/100
Migration
Amphidromous
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 10 - 12; Dorsal soft rays (total): 26 - 29; Anal spines: 2; Anal soft rays: 6 - 8. : fusiform / normal.

🌀 Behaviour

Behavioural data for Coitor croaker is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

Size at Maturity
19.7cm TL

🌍 Habitat & Distribution

Marine; freshwater; brackish; demersal; amphidromous . Tropical West Pacific: east coast of India, Bangladesh, Burma southward to about Singapore and Borneo around Brunei to Australia (Ref.

🌿 Ecology

Zone Preferences
🌊 Marine 💧 Freshwater 🌿 Brackish ⬇️ Benthic
Migration
Amphidromous
Trophic Level
3.4±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.00741 × L2.94 (TL)
Max TL
16cm
Dorsal Spines
11
Dorsal Rays
28
Anal Spines
2
Anal Rays
7

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
17.00/100
Low vulnerability
Trophic Level
3.4
Predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Described By
Hamilton, 1822

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Big-eyed Jewfish · Coitor Croacker · Coitor Croaker · Ganges Croaker
🌍BEN Koitor
🌍CES smuhoun indonéský
🌍NEP Bhola
🇵🇹Portuguese Corvina-alongada
🇷🇺Russian Индийский джоний

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 1 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

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