📖 Overview
Gulf weakfish (Cynoscion othonopterus), first described by Jordan & Gilbert, 1882 is a large fish in the family Sciaenidae (order Perciformes). Adults typically reach 70.00 cm in maximum length and up to 2.400 kg. 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 Vulnerable.The species is important as a food fish and valued as a game and sport species. As a member of the Sciaenidae, it shares life-history and morphological traits with its relatives in the group.
Scientific Name
Cynoscion othonopterus
Authority
Jordan & Gilbert, 1882
Body Shape
Fusiform / normal
🐟 Physical Description
Dorsal spines (total): 10 - 11; Dorsal soft rays (total): 23 - 27; Anal spines: 2; Anal soft rays: 10 - 11. Silvery, blue gray above, with dark dots on scales; tips of chin dusky; lining of opercle dusky; fins yellowish .: fusiform / normal.
🌀 Behaviour
Behavioural data for Gulf weakfish is currently being
reviewed.
🦐 Diet
aquatic invertebrates
small fish
algae
detritus
🥚 Reproduction
Size at Maturity
29.5cm TL
🌍 Habitat & Distribution
Marine; brackish; benthopelagic. Subtropical; 32°N - 25°N Central Pacific: Gulf of California.
🌿 Ecology
Zone Preferences
🌊 Marine
🌿 Brackish
📐 Morphometrics
Length–Weight Relationship:
W = 0.00871 × L3.06
(TL)
🌡️ Water Parameters & Tolerance
🛡️ Conservation Assessment
📊 Population Risk & Fisheries
Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
36.00/100
Moderate vulnerability
Trophic Level
3.9
Predator
Body Shape
Fusiform / normal
Described By
Jordan & Gilbert, 1882
🎣 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
"Cynoscion Othonopterus 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
Per 100g cooked - Source: USDA FoodData Central
| Nutrient |
Amount |
| Protein |
18.4 g |
| Omega-3 (total) |
350 mg
|
🔬 Mercury Safety
Mercury data for Gulf weakfish 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
🔬 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 |
| - |
- |
- |
|