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🌿 Brackish Endangered 🍽️ Edible 🌡️ Temperate

Knysna seahorse

Hippocampus capensis Boulenger, 1900
Max Length
-
Max Weight
-
Lifespan
-
Trophic Level
3.4
Depth
0–27 m
Climate
Temperate
Resilience
Low
Vulnerability
16.00/100
Typical Length
7 cm
Depth Zone
demersal

📖 Overview

Found in bays and estuaries among submerged vegetation; diurnal . Can tolerate salinities from 1-59 ppt . Ovoviviparous . The male carries the eggs in a brood pouch which is found under the tail . Length type refers to Height (= from top of coronet to the tip of straightened tail). Breeding in the aquarium is possible .

Scientific Name
Hippocampus capensis
Authority
Boulenger, 1900
Habitat
Brackish
Climate
Temperate
Body Shape
Other
IUCN Status
EN
Depth Range
0–27 m
Trophic Level
3.4
Resilience
Low
Vulnerability
16.00/100
Migration
Non-migratory
Water Temp
18–22 °C

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 0; Dorsal soft rays (total): 16 - 18; Anal spines: 0; Anal soft rays: 3. : other.

🌀 Behaviour

Behavioural data for Knysna seahorse is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

Size at Maturity
5.8cm TL

Male carries the eggs in a brood pouch .

🌍 Habitat & Distribution

Brackish; demersal; non-migratory; depth range 0 - 27 m . Temperate; 18°C - 22°C ; 33°S - 34°S Southeast Atlantic: endemic to South Africa.

🌿 Ecology

Zone Preferences
🌿 Brackish ⬇️ Benthic
Migration
Non-migratory
Trophic Level
3.4±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.00447 × L3 (TL)
Dorsal Rays
17
Anal Rays
3

🌡️ Water Parameters & Tolerance

Temperature Range
18–22°C

🛡️ Conservation Assessment

IUCN Category
Endangered
Assessment Date
2017

📊 Population Risk & Fisheries

Population Resilience
Low
Minimum doubling time
Fishing Vulnerability
16.00/100
Low vulnerability
Trophic Level
3.4
Predator
Body Shape
Other
Climate Zone
Temperate
Described By
Boulenger, 1900

🍽️ Edibility & Flavour

"Knysna seahorse 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 Knysna seahorse is currently being compiled from USDA FoodData Central.

🔬 Mercury Safety

Mercury data for Knysna seahorse 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 (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 Cape Seahorse · Knysna seahorse
🌍AFR Knysna-seeperdjie · Seeperdjie
🏳️Catalan Cavallet de mar del cap
🌍CES koníček kapský
🇩🇪German Knysna-Seepferdchen
🇮🇹Italian Cavalluccio del Capo · Ippocampo del Capo
🇵🇹Portuguese Cavalo-marinho-do-cabo
🇪🇸Spanish Caballito de mar de Knysna
🇨🇳Chinese 南非海馬

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 1 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

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