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

💧 Freshwater Endangered 🌡️ Tropical

Drysdale grunter

Syncomistes rastellus Vari & Hutchins, 1978
Max Length
15 cm
Max Weight
-
Lifespan
-
Trophic Level
2
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
22.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Adults inhabit larger streams rather than small tributaries, forming schools in rock pools and over sand bottoms . They retreat to crevices when threatened . Feed on filamentous algae by grazing on rocks. . Sometimes form mixed shoals with S. trigonicus. Breed during the late dry or early wet season (October to December) . Eggs are guarded and fanned by the male parent . Aquarium conditions: pH=7.5, H=12, 26°C, egg layer, peaceful community fish, plant and rock cover .

Scientific Name
Syncomistes rastellus
Authority
Vari & Hutchins, 1978
Habitat
Freshwater
Climate
Tropical
IUCN Status
EN
Max Length
15 cm
Trophic Level
2
Resilience
High
Vulnerability
22.00/100
Migration
Non-migratory
Salinity
0–0.5 ppt

🔬 Taxonomy

🐟 Physical Description

Physical description for Drysdale grunter is currently being compiled.

🌀 Behaviour

Behavioural data for Drysdale grunter is currently being reviewed.

🦐 Diet

algae
aquatic plants
detritus

🥚 Reproduction

🐣 Oviparous
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

Eggs are guarded and fanned by the male parent .

🌍 Habitat & Distribution

Freshwater; benthopelagic; non-migratory. Tropical; 13°S - 15°S Endemic, known from the northern coastal drainages, western Australia; Gibb and Drysdale Rivers.

🌿 Ecology

Zone Preferences
💧 Freshwater
Migration
Non-migratory
Trophic Level
2
🐠 Schooling
Food Items

filamentous algae by grazing on rocks

📐 Morphometrics

Length–Weight Relationship: W = 0.00759 × L2.96 (TL)
Max TL
15cm

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Endangered
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
22.00/100
Low vulnerability
Trophic Level
2
Omnivore / Planktivore
Climate Zone
Tropical
Described By
Vari & Hutchins, 1978

🗺️ Global Occurrence Map

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

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Drysdale grunter ↗
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.