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Setting up your tank

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Natal knifejaw (Oplegnathus robinsoni) fish species and information / pictures of Natal knifejaw - Oplegnathus robinsoni

Natal knifejaw (Oplegnathus robinsoni) fish species information

Scientific Name
Oplegnathus robinsoni

Common Name
Natal knifejaw

Biology
Dorsal spines (total): 11; Dorsal soft rays (total): 20-24; Anal spines: 3; Anal soft rays: 14 - 17. Adults dark grey in color; juveniles yellow with black bars (very similar to young Diplodus cervinus hottentotus.

Classification

Classified By

Regan, 1916

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Knifejaws (Oplegnathidae)

Distribution

Region

Western Indian Ocean

Distribution

Western Indian Ocean: occurs only in Mozambique and Natal, South Africa.

Range

Unknown

Environment

Climate

Subtropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

20 m

Depth To - meters

100 m

Zone

reef-associated

Environment

Marine; reef-associated; depth range 20 - 100 m (Ref. 4387)

Trophic Level

3.17 s.e. 0.42 Based on food items.

Occurs in Marine / Salt water

True

Occurs in Brackish water

False

Occurs in Fresh Water

False

Occurs on Reefs

True

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

60.0 cm

Common Length

40.0 cm

Phylogenetic Diversity Index

PD50 = 0.5156 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: commercial; gamefish: yes

Vulnerability

Moderate vulnerability (38 of 100)

Resilience

Low, minimum population doubling time 4.5 - 14 years (tmax > 10)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated