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💧 Freshwater Near Threatened 🌡️ Tropical

Leathery grunter

Scortum hillii Castelnau, 1878
Max Length
35 cm
Max Weight
1.0 kg
Lifespan
-
Trophic Level
2.5
Depth
-
Climate
Tropical
Resilience
Medium
Vulnerability
41.00/100
Typical Length
25 cm
Depth Zone
demersal

📖 Overview

Adults inhabit a variety of conditions ranging from brackish estuaries to clear or turbid flowing streams and still pools. Usually in schools feeding on benthic mussels and algae . Temp. range: 12-37.5°C . Form shoals near the bottom . Spawn in summer floods (November, water temp. of 26-28°C) after nocturnal upstream migration. Eggs are guarded and fanned by the male parent . Maturity: M, 25 cm SL; F, >30 cm SL; 50,000 eggs per kg; non-adhesive eggs, 2.5-4.0 mm diameter .

Scientific Name
Scortum hillii
Authority
Castelnau, 1878
Habitat
Freshwater
Climate
Tropical
IUCN Status
NT
Max Length
35 cm
Max Weight
1 kg
Trophic Level
2.5
Resilience
Medium
Vulnerability
41.00/100
Migration
Potamodromous

🐟 Physical Description

Physical description for Leathery grunter is currently being compiled.

🌀 Behaviour

Behavioural data for Leathery grunter is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

Eggs are guarded and fanned by the male parent .

🌍 Habitat & Distribution

Freshwater; brackish; demersal; potamodromous . Tropical; 17°S - 23°S Endemic to Australia.

🌿 Ecology

Zone Preferences
💧 Freshwater 🌿 Brackish ⬇️ Benthic
Migration
Potamodromous
Trophic Level
2.5±0.2
🐠 Schooling 🌙 Nocturnal

📐 Morphometrics

Length–Weight Relationship: W = 0.01698 × L2.99 (TL)
Max TL
35cm
Max Weight
1,000g

🛡️ Conservation Assessment

IUCN Category
Near Threatened
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
41.00/100
Moderate vulnerability
Trophic Level
2.5
Omnivore / Planktivore
Climate Zone
Tropical
Described By
Castelnau, 1878

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