📖 Overview
Marbled flounder (Pseudopleuronectes yokohamae), first described by Günther, 1877 is a large fish in the family Pleuronectidae (order Pleuronectiformes). Adults typically reach 45.00 cm in maximum length and up to 1.900 kg. It inhabits marine coastal and open-ocean environments. It occurs in Temperate 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 Near Threatened.The species is important as a food fish, valued as a game and sport species, and considered a sustainable seafood option under current management. As a member of the Pleuronectidae, it shares life-history and morphological traits with its relatives in the group.
Scientific Name
Pseudopleuronectes yokohamae
Body Shape
Short and / or deep
🐟 Physical Description
: short and / or deep.
🌀 Behaviour
Behavioural data for Marbled flounder is currently being
reviewed.
🦐 Diet
aquatic invertebrates
small fish
algae
detritus
🥚 Reproduction
Size at Maturity
27.4cm TL
🌍 Habitat & Distribution
Marine; demersal. Temperate Northwest Pacific: southern Hokkaido, Japan to the Yellow Sea, the Gulf of Bo Hai, and the northern part of the East China Sea, including Korea (Ref.
🌿 Ecology
Zone Preferences
🌊 Marine
⬇️ Benthic
Food Items
polychaetes (Ref
📐 Morphometrics
Length–Weight Relationship:
W = 0.00776 × L3.07
(TL)
🌡️ Water Parameters & Tolerance
🛡️ Conservation Assessment
IUCN Category
Near Threatened
📊 Population Risk & Fisheries
Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
36.00/100
Moderate vulnerability
Trophic Level
3.3
Predator
Body Shape
Short and / or deep
Described By
Günther, 1877
🎣 Angling Guide
Fight Rating
strong pulls with head-shakes
Best Seasons
spring,summer,fall
Best Time
incoming tide, dawn and dusk
Rod Type
medium-heavy spinning
Catch & Release
✓ Recommended
Best Months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Techniques
bottom fishing
popping cork
soft plastics
live bait
Bait & Lures
live shrimp
cut mullet
soft plastic paddle-tails
popping corks
Recommended Tackle
-
medium-heavy 7ft spinning rod
-
30-50 lb braid
-
fluorocarbon leader
Where to Find Them
-
grass flats
-
oyster bars
-
marsh drains
-
deeper channel edges
Tips & Tricks
Popping cork technique attracts fish from distance. Fish moving tides.
Catch & Release Tips
Use barbless hooks, minimise air exposure, and revive fish head-first in current before release.
Regulations Summary
⚠️
Slot limits protect breeding-size fish. Verify daily bag limits.
🍽️ Edibility & Flavour
"Marbled flounder is an edible species."
✓ Suitable 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 Marbled flounder is
currently being compiled from USDA FoodData Central.
🔬 Mercury Safety
Mercury data for Marbled flounder 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
✓ Sustainable Choice
🔬 Full Nutritional Profile
Per 100g - Raw, per 100g
- Source: USDA FoodData Central templates (lean white fish average)
Proximate Composition
Energy90 kcal
Moisture80 %
Protein18 %
Total Fat1.2 %
Ash1.2 %
Fatty Acids (g)
Saturated Fat0.3 g
Monounsaturated Fat0.2 g
Polyunsaturated Fat0.4 g
Omega-3 Total0.3 g
EPA0.08 g
DHA0.15 g
Omega-6 Total0.05 g
Key Minerals & Vitamins
Calcium18 mg
Iron0.4 mg
Magnesium30 mg
Phosphorus200 mg
Potassium380 mg
Sodium60 mg
Zinc0.4 mg
Selenium30 µg
Vitamin B60.3 mg
Vitamin B121 µg
📊 Population Dynamics
| Year |
Region |
Index |
Notes |
| - |
- |
- |
|
🌐 Names & Taxonomy
Scientific Synonyms
|
Scientific Name |
Author |
Year |
Status |
|
Limanada yokohamae |
Günther |
1877 |
Synonym
|
|
Limanda yokohamae |
Günther |
1877 |
Synonym
|
|
Pleuronectes yokohamae |
Günther |
1877 |
Synonym
|
🗺️ Global Occurrence Map
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 2 records indexed
.