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

🌊 Marine Data Deficient 🌡️ Subtropical

Threeline tonguesole

Cynoglossus marleyi Regan, 1921
Max Length
35 cm
Max Weight
-
Lifespan
-
Trophic Level
3.5
Depth
-
Climate
Subtropical
Resilience
Medium
Vulnerability
31.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Threeline tonguesole (Cynoglossus marleyi), first described by Regan, 1921 is a medium-sized fish in the family Cynoglossidae (order Pleuronectiformes). Adults typically reach 35.00 cm in maximum length. It inhabits marine coastal and open-ocean environments. It occurs in Subtropical waters. It feeds on a mix of small fish and invertebrates as a mid-level predator. On the IUCN Red List, it is classified as Data Deficient.

Scientific Name
Cynoglossus marleyi
Authority
Regan, 1921
Habitat
Marine
Climate
Subtropical
Body Shape
Short and / or deep
IUCN Status
DD
Max Length
35 cm
Trophic Level
3.5
Resilience
Medium
Vulnerability
31.00/100
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 0; Dorsal soft rays (total): 126 - 130; Anal spines: 0; Anal soft rays: 105 - 110. Upper side uniformly brown; caudal fin and posterior parts of dorsal and anal fins blackish .: short and / or deep.

🌀 Behaviour

Behavioural data for Threeline tonguesole is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous 📦 Batch Spawner
Spawning Season
spring-summer
Spawn Location
Pelagic
Fertilization
External

🌍 Habitat & Distribution

Marine; demersal. Subtropical South Africa.

🌿 Ecology

Zone Preferences
🌊 Marine ⬇️ Benthic
Trophic Level
3.5±0.37
Food Items

small invertebrates (Ref

📐 Morphometrics

Length–Weight Relationship: W = 0.01047 × L3.05 (TL)
Max TL
35cm
Dorsal Rays
128
Anal Rays
108

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Data Deficient
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
31.00/100
Low vulnerability
Trophic Level
3.5
Predator
Body Shape
Short and / or deep
Climate Zone
Subtropical
Described By
Regan, 1921

🌐 Names & Taxonomy

Scientific Synonyms

Scientific Name Author Year Status
Areliscus marleyi Regan 1921 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
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Threeline tonguesole ↗
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.