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Diadromous Vulnerable 🍽️ Edible 🎣 Game Fish 🌡️ Temperate

Australian grayling

Prototroctes maraena Günther, 1864
Max Length
33 cm
Max Weight
-
Lifespan
6 yrs
Trophic Level
2.8
Depth
-
Climate
Temperate
Resilience
High
Vulnerability
29.00/100
Typical Length
18 cm
Depth Zone
demersal

📖 Overview

Adults inhabit creeks and rivers, usually in cool, clear waters over gravel bottoms in sections alternating between pools and rapids. Usually found in clear, moderate to fast-flowing water in the upper reaches of rivers (sometimes to altitudes above 1000 meters). Often forming aggregations below barriers to upstream movement. Timid species that forms fast-moving shoals . Often form large schools especially prior to spawning. Feed on small crustaceans, insects and their larvae and algae. The intestinal tract is long, s specialization to assist in the breakdown of ingested plant material . Spawn: Feb.-May; 25,000-68,000 eggs which sink to bottom downstream of spawning site. Hatching: 10-20 days; larvae, 6-7 mm TL, swept downstream to estuaries and the sea, return to freshwater after 6 months.

Scientific Name
Prototroctes maraena
Authority
Günther, 1864
Habitat
Diadromous
Climate
Temperate
Body Shape
Elongated
IUCN Status
VU
Max Length
33 cm
Lifespan
6 years
Trophic Level
2.8
Resilience
High
Vulnerability
29.00/100
Migration
Amphidromous
Water Temp
10–25 °C
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

: elongated.

🌀 Behaviour

Behavioural data for Australian grayling is currently being reviewed.

🦐 Diet

Diet information for Australian grayling is currently being compiled.

🥚 Reproduction

Reproduction data for Australian grayling is currently being compiled.

🌍 Habitat & Distribution

Marine; freshwater; brackish; demersal; amphidromous . Temperate; 10°C - 25°C ; 34°S - 45°S South Australia, including Tasmania and King Island in Bass Strait.

🌿 Ecology

Zone Preferences
🌊 Marine 💧 Freshwater 🌿 Brackish ⬇️ Benthic
Migration
Amphidromous
Trophic Level
2.8±0.34
🐠 Schooling
Food Items

small crustaceans, insects and their larvae and algae

📐 Morphometrics

Length–Weight Relationship: W = 0.00372 × L3.14 (TL)
Max TL
33cm

🌡️ Water Parameters & Tolerance

Temperature Range
10–25°C
Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Vulnerable
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
29.00/100
Low vulnerability
Trophic Level
2.8
Omnivore / Planktivore
Body Shape
Elongated
Climate Zone
Temperate
Described By
Günther, 1864

🍽️ Edibility & Flavour

"Australian grayling is an edible species."

✗ Not for Raw
✓ Fresh Indicators
  • Clear, bright eyes — cloudy eyes indicate age
  • Firm flesh that springs back when pressed
  • Fresh ocean smell, never strong or ammonia-like
  • Bright red or pink gills, not grey or brown
  • Shiny, moist skin with scales tightly attached
✗ Avoid If
  • Cloudy or sunken eyes
  • Strong fishy or ammonia odour
  • Soft, mushy flesh that doesn't spring back
  • Discoloured or dry flesh
Best Cooking Methods
Baking Grilling Pan-frying

Nutrition

Detailed nutritional data for Australian grayling is currently being compiled from USDA FoodData Central.

🔬 Mercury Safety

Mercury data for Australian grayling has not yet been assigned. Please consult FDA/EPA guidance for general seafood safety advice.

🌿 Sustainability

Best Choice
Healthy stocks, low impact
Good Alternative
Well-managed, minor concerns
Use Caution
Check sourcing and season
Avoid
Overfished or high impact

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Australian Grayling · Cucumber Herring · Cucumber Mullet · Cucumber-fish · Cucumberfish · Yarra Herring
🌍CES koruškovec australský
🇩🇪German Cucumber Hering · Grayling
🇫🇮Finnish Kurkkukuore
🇷🇺Russian Австралийский прототрокт · прототрокт австралийский
🇨🇳Chinese 澳洲南茴魚

Scientific Synonyms

Scientific Name Author Year Status
Prototroctes maraema Günther 1864 Synonym

🗺️ 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
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