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

🌊 Marine Least Concern 🍽️ Edible 🌡️ Subtropical

Blue bobo

Polydactylus approximans Lay & Bennett, 1839
Max Length
36.8 cm
Max Weight
-
Lifespan
-
Trophic Level
3.6
Depth
10–60 m
Climate
Subtropical
Resilience
High
Vulnerability
24.00/100
Typical Length
20 cm
Depth Zone
demersal

📖 Overview

Found in shallow water near the coast, on sand and mud bottoms . Larvae and small juveniles (>4 cm) are pelagic and sometimes occur several hundred kilometers offshore, whereas the larger juveniles and adults prefer shallow near-shore waters like bays, sloughs or estuaries where the bottom is sandy or muddy . Omnivorous, feeds on worms, sand crabs, shrimp, clams; sometimes feeds on fish like small anchovy . Esteemed food fish where it occurs . Also Ref. 55763.

Scientific Name
Polydactylus approximans
Authority
Lay & Bennett, 1839
Habitat
Marine
Climate
Subtropical
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
36.8 cm
Depth Range
10–60 m
Latitude
12°S – 37°N
Trophic Level
3.6
Resilience
High
Vulnerability
24.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 9; Dorsal soft rays (total): 11 - 13; Anal spines: 3; Anal soft rays: 13 - 15; Vertebrae: 24. Body grayish, no stripes or spots. Lip on lower jaw well developed. Dentary teeth restricted to dorsal surface. Maxilla not covered with scales. Pectoral filaments 6; longest not reaching beyond level of posterior end of anal fin base. Lateral line bifurcated on caudal fin membranes, extending to posterior margins of upper and lower caudal fin lobes. Swim bladder present .: fusiform / normal; Cross section: compressed.

🌀 Behaviour

Behavioural data for Blue bobo 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; brackish; demersal; depth range 10 - 60 m . Subtropical; 37°N - 12°S, 122°W - 77°W north of Baja California, Mexico (Ref.

🌿 Ecology

Zone Preferences
🌊 Marine 🌿 Brackish ⬇️ Benthic
Trophic Level
3.6±0.6
Food Items

worms, sand crabs, shrimp, clams; sometimes feeds on fish like small anchovy (Ref

📐 Morphometrics

Length–Weight Relationship: W = 0.00661 × L3.06 (TL)
Max TL
36.8cm
Dorsal Spines
9
Dorsal Rays
12
Anal Spines
3
Anal Rays
14
Vertebrae
24

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2007

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
24.00/100
Low vulnerability
Trophic Level
3.6
Predator
Body Shape
Fusiform / normal
Climate Zone
Subtropical
Latitude Range
37°N – 12°S
Described By
Lay & Bennett, 1839

🍽️ Edibility & Flavour

"Blue bobo 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 20.2 g
Omega-3 (total) 402 mg

🔬 Mercury Safety

Mercury data for Blue bobo 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 (generic fish average)

Proximate Composition
Energy125 kcal
Moisture75 %
Protein20 %
Total Fat4 %
Ash1.3 %
Fatty Acids (g)
Saturated Fat1 g
Monounsaturated Fat1.2 g
Polyunsaturated Fat1.5 g
Omega-3 Total1 g
EPA0.3 g
DHA0.5 g
Omega-6 Total0.3 g
Key Minerals & Vitamins
Calcium20 mg
Iron0.7 mg
Magnesium30 mg
Phosphorus220 mg
Potassium380 mg
Sodium55 mg
Zinc0.5 mg
Selenium32 µg
Vitamin B122 µg

📊 Population Dynamics

Year Region Index Notes
- - -

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Pacific threadfin · blue bobo
🌍CES smuhovec pobřežní
🇫🇷French barbure bleu
🇵🇹Portuguese Barbudo-de-Monterey
🇷🇺Russian Чернощёкий пальцепёр
🇪🇸Spanish Barbon · Barbudo común · Guapuro · aguapuro · barbeta · barbudo azul · barbudo seis barbas

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 84 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 Blue bobo ↗
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.