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💧 Freshwater Least Concern 🍽️ Edible ⚡ Potential pest 🌡️ Tropical

Redbelly tilapia

Coptodon zillii Gervais, 1848
Max Length
40 cm
Max Weight
Lifespan
7 yrs
Trophic Level
2.5
Depth
1–7 m
Climate
Tropical
Resilience
Medium
Vulnerability
27.00/100
Typical Length
30 cm
Depth Zone

📖 Overview

Highly adaptable and tolerates varying water qualities ; they are tolerant of a wide range of temperatures and salinities , even surviving marine conditions . Extended temperature range 6.5 - 42.5 °C, natural temperature range 10.5 - 36°C . Occasionally form schools; mainly diurnal. Adults prefer shallow, vegetated areas . Fry are common in marginal vegetation and juveniles are found in the seasonal floodplain. Herbivorous , adults feed on leaves and stems of underwater plants as well as algae and vegetative detritus . A substrate spawner ; male and female form pairs to rear the young ; aggs and larvae are usually guarded in a pit dug in the mud . Parental care is very thorough and undertaken by both parties; large specimens may deposit 1000 eggs per spawn, preferably on hard surfaces; hatching occurs about 96 hours post spawning, and juveniles swim freely about 4-6 days later . Larvae develop in close association with substrate.

Scientific Name
Coptodon zillii
Authority
Gervais, 1848
Habitat
Freshwater
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
40 cm
Lifespan
7 years
Depth Range
1–7 m
Latitude
9°S – 35°N
Trophic Level
2.5
Resilience
Medium
Vulnerability
27.00/100
Migration
Potamodromous
Water Temp
11–36 °C

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 13 - 16; Dorsal soft rays (total): 10 - 14; Anal spines: 3; Anal soft rays: 8 - 10. Diagnosis: A large, deep-bodied species with a narrow head and small strong jaws; generally has a bright red belly and prominent vertical barring . Upper profile of head not convex; lower pharyngeal bone about as long as broad, and with anterior lamella shorter than toothed area; median pharyngeal teeth not broadened; dorsal fin with 14-16 spines and 10-14 soft rays; 8-11 lower gillrakers; dark longitudinal band appears on flanks when agitated; no bifurcated dark vertical bars on flanks; dorsal and caudal fins not or feebly blotched . Body brownish-olivaceous with an iridescent blue sheen; lips bright green . Chest pinkish . Dorsal, caudal and anal fins brownish-olivaceous with yellow spots, dorsal and anal fins outlined by narrow orange band; "tilapian" spot large, extending from last spine to 4th soft ray and always bordered by yellow band . Specimens of 2-14 cm standard length with completely yellowish or greyish caudal fin without dots, but tend to develop a greyish caudal fin with dots of increasing size during development; above 14 cm standard length, this species has greyish caudal fins with dots on entire caudal fin . The sexes look very similar, although in a mated pair the male is usually larger . Difficult to distinguish reliably from Coptodon rendalli, but C. zillii can have a less-steep head profile and more prominent vertical bars; in East Africa, the tailfin of C. rendalli is often divided into a brown/grey upper part and red/yellowish lower part, whereas the tail of C. zillii is more uniform throughout . : fusiform / normal; Cross section: compressed.

🌀 Behaviour

Behavioural data for Redbelly tilapia is currently being reviewed.

🦐 Diet

Diet information for Redbelly tilapia is currently being compiled.

🥚 Reproduction

Size at Maturity
7cm TL

Spawns in lake bottoms with pebbles or sand and abundant vegetation . Lays adhesive eggs on the substratum which are guarded by both parents . Reported to deposit and guard eggs in shallow nest . Produces up to 1000 eggs .

🌍 Habitat & Distribution

Freshwater; brackish; benthopelagic; pH range: 6.0 - 9.0; dH range: 5 - 20; potamodromous ; depth range 1 - 7 m . Tropical; 11°C - 36°C ; 35°N - 9°S, 17°W - 36°E South Morocco, Sahara, Niger-Benue system, rivers Senegal, Sassandra, Bandama, Boubo, Mé, Comoé, Bia, Ogun and Oshun, Volta system, Chad-Shari system (Ref.

🌿 Ecology

Zone Preferences
💧 Freshwater 🌿 Brackish
Migration
Potamodromous
Trophic Level
2.5±0.1
🐠 Schooling
Food Items

leaves and stems of underwater plants as well as algae and vegetative detritus (Ref

📐 Morphometrics

Length–Weight Relationship: W = 0.01514 × L2.99 (TL)
Max TL
40cm
Dorsal Spines
15
Dorsal Rays
12
Anal Spines
3
Anal Rays
9

🌡️ Water Parameters & Tolerance

Temperature Range
11–36°C
pH Range
6–9

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
27.00/100
Low vulnerability
Trophic Level
2.5
Omnivore / Planktivore
Body Shape
Fusiform / normal
Climate Zone
Tropical
Latitude Range
35°N – 9°S
Described By
Gervais, 1848

🍽️ Edibility & Flavour

"Redbelly tilapia 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) 187 mg

🔬 Mercury Safety

Mercury data for Redbelly tilapia 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

👥 Community & Contribute

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