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🌊 Marine Data Deficient 🌡️ Deep-water

Slender guitarfish

Rhinobatos holcorhynchus Norman, 1922
Max Length
127 cm
Max Weight
-
Lifespan
-
Trophic Level
3.8
Depth
75–253 m
Climate
Deep-water
Resilience
Low
Vulnerability
62.00/100
Typical Length
-
Depth Zone
deep-water

📖 Overview

A rare and unknown species found offshore on the shelf . Ovoviviparous . Taken as bycatch of trawl and gillnet fisheries .

Scientific Name
Rhinobatos holcorhynchus
Authority
Norman, 1922
Habitat
Marine
Climate
Deep-water
Body Shape
Elongated
IUCN Status
DD
Max Length
127 cm
Depth Range
75–253 m
Trophic Level
3.8
Resilience
Low
Vulnerability
62.00/100
Salinity
30–40 ppt

🐟 Physical Description

A guitarfish with a narrow, sharply pointed snout and a narrow pectoral disc; nasal flaps extend only to the inner nostril edges . Plain olive-green above, without spots; prominent black blotch on underside of snout .: elongated.

🌀 Behaviour

Behavioural data for Slender guitarfish is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous 📦 Batch Spawner
Spawning Season
spring-summer
Spawn Location
Pelagic
Fertilization
External

Exhibit ovoviparity (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment from the mother by indirect absorption of uterine fluid enriched with mucus, fat or protein through specialised structures .

🌍 Habitat & Distribution

Marine; demersal; depth range 75 - 253 m . Deep-water; 2°S - 31°S, 30°E - 43°E South Africa.

🌿 Ecology

Zone Preferences
🌊 Marine 🌑 Deep Water ⬇️ Benthic
Trophic Level
3.8±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.00302 × L3.13 (TL)
Max TL
127cm

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Data Deficient
Assessment Date
2018

📊 Population Risk & Fisheries

Population Resilience
Low
Minimum doubling time
Fishing Vulnerability
62.00/100
High vulnerability
Trophic Level
3.8
Predator
Body Shape
Elongated
Climate Zone
Deep-water
Described By
Norman, 1922

👥 Community & Contribute

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