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Diadromous Data Deficient 🌡️ Tropical

Burro grunt

Rhonciscus crocro Cuvier, 1830
Max Length
38 cm
Max Weight
1.9 kg
Lifespan
-
Trophic Level
4
Depth
0–120 m
Climate
Tropical
Resilience
Medium
Vulnerability
36.00/100
Typical Length
25 cm
Depth Zone
demersal

📖 Overview

Inhabits rivers and creeks of low to high current velocity . Found along sandy shores and over mud bottoms in shallow water, quite common in brackish mangrove-lined lagoons. Often ascends rivers more than 100 miles from the sea. Feeds on crustaceans and small fishes. Marketed fresh .

Scientific Name
Rhonciscus crocro
Authority
Cuvier, 1830
Habitat
Diadromous
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
DD
Max Length
38 cm
Max Weight
1.9 kg
Depth Range
0–120 m
Latitude
34°S – 31°N
Trophic Level
4
Resilience
Medium
Vulnerability
36.00/100
Migration
Amphidromous
Water Temp
25–28 °C
Salinity
30–40 ppt

🔬 Taxonomy

Genus
Rhonciscus
Rhonciscus
Species
Burro grunt
Rhonciscus crocro

🐟 Physical Description

: fusiform / normal.

🌀 Behaviour

Behavioural data for Burro grunt is currently being reviewed.

🦐 Diet

small fish
crustaceans
cephalopods

🥚 Reproduction

🐣 Oviparous

Oviparous, distinct pairing during breeding .

🌍 Habitat & Distribution

Marine; freshwater; brackish; demersal; amphidromous ; depth range 0 - 120 m . Tropical; 25°C - 28°C ; 31°N - 34°S, 98°W - 34°W

🌿 Ecology

Zone Preferences
🌊 Marine 💧 Freshwater 🌿 Brackish ⬇️ Benthic
Migration
Amphidromous
Trophic Level
4±0.67
Food Items

crustaceans and small fishes

📐 Morphometrics

Length–Weight Relationship: W = 0.01318 × L2.98 (TL)
Max TL
38cm
Max Weight
1,900g

🌡️ Water Parameters & Tolerance

Temperature Range
25–28°C
Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Data Deficient
Assessment Date
2018

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
36.00/100
Moderate vulnerability
Trophic Level
4
Apex / Top predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Latitude Range
31°N – 34°S
Described By
Cuvier, 1830

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