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🌊 Marine Data Deficient 🌡️ Tropical

Large-scale croaker

Johnius heterolepis Bleeker, 1873
Max Length
15 cm
Max Weight
-
Lifespan
-
Trophic Level
3.4
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
16.00/100
Typical Length
12 cm
Depth Zone
-

📖 Overview

Large-scale croaker (Johnius heterolepis) is a ray-finned fish of the family Sciaenidae. It inhabits marine (saltwater) waters. This species can reach a maximum total length of 15 cm. With a trophic level of 3.4, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Data Deficient on the IUCN Red List.

Scientific Name
Johnius heterolepis
Authority
Bleeker, 1873
Habitat
Marine
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
DD
Max Length
15 cm
Trophic Level
3.4
Resilience
High
Vulnerability
16.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 11; Dorsal soft rays (total): 25 - 28; Anal spines: 2; Anal soft rays: 7. Greenish or bluish grey above, silvery below; fins yellowish .: fusiform / normal.

🌀 Behaviour

Behavioural data for Large-scale croaker is currently being reviewed.

🦐 Diet

Diet information for Large-scale croaker is currently being compiled.

🥚 Reproduction

Reproduction data for Large-scale croaker is currently being compiled.

🌍 Habitat & Distribution

Marine; benthopelagic. Tropical

🌿 Ecology

Zone Preferences
🌊 Marine
Trophic Level
3.4±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.00832 × L3.09 (TL)
Max TL
15cm
Dorsal Spines
11
Dorsal Rays
27
Anal Spines
2
Anal Rays
7

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Data Deficient
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
16.00/100
Low vulnerability
Trophic Level
3.4
Predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Described By
Bleeker, 1873

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