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Oneknife unicornfish (Naso thynnoides) fish species and information / pictures of Oneknife unicornfish - Naso thynnoides

Oneknife unicornfish (Naso thynnoides) fish species information

Scientific Name
Naso thynnoides

Common Name
Oneknife unicornfish

Biology
Dorsal spines (total): 4; Dorsal soft rays (total): 28-30; Anal spines: 2; Anal soft rays: 27 - 29. Body elongate-ovate. Dorsal and anal profiles nearly even. Forehead without rostral prominence when in adults. Peduncular plate single, with a semicircular, retrorsely curved keel. Reaches 35 cm SL.

Classification

Classified By

Cuvier, 1829

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Surgeonfishes, tangs, unicornfishes (Acanthuridae)

Distribution

Region

Indo-Pacific

Distribution

Indo-Pacific: East Africa to Micronesia (excluding the Marshall Islands), north to the Ryukyu Islands, south to the Solomon Islands and the Great Barrier Reef. Range extending to Rangiroa Atoll, Tuamotu Archipelago.

Range

Unknown

Environment

Climate

Tropical

Water Temperature From

22 °C

Water Temperature To

24 °C

Depth From - meters

2 m

Depth To - meters

40 m

Zone

reef-associated

Environment

Marine; reef-associated; depth range 2 - 40 m (Ref. 48637), usually 10 - ? m

Trophic Level

2.96 s.e. 0.32 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

True

Physical Size and Genetics

Maximum Length

40.0 cm

Common Length

25.0 cm

Phylogenetic Diversity Index

PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: commercial; aquarium: commercial

Vulnerability

Moderate vulnerability (41 of 100)

Resilience

Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated