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💧 Freshwater Least Concern 🍽️ Edible 🐠 Aquarium 🌡️ Tropical

Fenestratus

Protomelas fenestratus Trewavas, 1935
Max Length
14 cm
Max Weight
-
Lifespan
-
Trophic Level
3.2
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
16.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Inhabits rocky shores and adjacent sandy areas. Characteristic of areas where the rocks are covered with a sediment layer. Feeds by blowing sediment off the rocks and picking at food items remaining .

Scientific Name
Protomelas fenestratus
Authority
Trewavas, 1935
Habitat
Freshwater
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
14 cm
Trophic Level
3.2
Resilience
High
Vulnerability
16.00/100
Water Temp
22–26 °C
Salinity
0–0.5 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 15 - 16; Dorsal soft rays (total): 10 - 11; Anal spines: 3; Anal soft rays: 9 - 10; Vertebrae: 31. Distinguished from P. taeniolatus by the more strongly marked pattern of longitudinal and vertical black stripes and in having fewer and larger teeth in the outer row of the upper jaw and on the lower pharyngeal bone, in having more fleshy lips which partly obscure the posterior teeth of the upper jaw, and in having fewer gill rakers, with the anterior ones very low and blunt. Differs from P. virgatus in not having the posterior teeth of the two inner rows of the lower pharyngeal enlarged.: fusiform / normal; Cross section: compressed.

🌀 Behaviour

Behavioural data for Fenestratus is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

👄 Mouth Brooder

Female mouth brooder.

🌍 Habitat & Distribution

Freshwater; benthopelagic; pH range: 8.0 - 8.0; dH range: 9 - 19. Tropical; 22°C - 26°C ; 9°S - 15°S southwest arm of Lake Malawi.

🌿 Ecology

Zone Preferences
💧 Freshwater
Trophic Level
3.2±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.01445 × L2.99 (TL)
Max TL
14cm
Dorsal Spines
16
Dorsal Rays
11
Anal Spines
3
Anal Rays
10
Vertebrae
31

🌡️ Water Parameters & Tolerance

Temperature Range
22–26°C
pH Range
8–8
Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2018

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
16.00/100
Low vulnerability
Trophic Level
3.2
Predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Described By
Trewavas, 1935

🍽️ Edibility & Flavour

"Fenestratus 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 Fenestratus is currently being compiled from USDA FoodData Central.

🔬 Mercury Safety

Mercury data for Fenestratus 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 Fenestratus · Fenestratus Hap
🇫🇮Finnish ikkunamalawinahven

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 24 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

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