Keel-jawed needle fish (Tylosurus acus melanotus) fish species and information / pictures of Keel-jawed needle fish - Tylosurus acus melanotus

Keel-jawed needle fish (Tylosurus acus melanotus) fish species information

Scientific Name
Tylosurus acus melanotus

Common Name
Keel-jawed needle fish

Biology
Dorsal spines (total): 0; Dorsal soft rays (total): 24-27; Anal spines: 0; Anal soft rays: 22 - 24; Vertebrae: 90 - 95. Anterior part of dorsal fin with a low lobe, contained 10.5-13.3 times in body length; a distinct black lateral keel on caudal peduncle; caudal fin deeply forked. Juveniles have an elevated black lobe in the posterior part of the dorsal fin (Ref. 9682). Longer jaws with more numerous teeth and narrower caudal lobes than T. crocodilus (Ref. 37816).

Classification

Classified By

Bleeker, 1850

Class

Ray-finned fishes (Actinopterygii)

Order

Needle fishes (Beloniformes)

Family

Needlefishes (Belonidae)

Distribution

Region

Indo-Pacific

Distribution

Indo-Pacific: East Africa (Ref. 3130) to the central and south Pacific. Eastern Central Pacific: oceanic islands such as the Revillagigedo, Clipperton and Cocos (Ref. 9279).

Range

32°N - 28°S

Environment

Climate

Tropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

0 m

Depth To - meters

1 m

Zone

reef-associated

Environment

Marine; reef-associated; oceanodromous (Ref. 51243); depth range 0 - 1 m (Ref. 58302)

Trophic Level

4.34 s.e. 0.76 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

100.0 cm

Common Length

115 cm

Phylogenetic Diversity Index

PD50 = No PD50 data many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: commercial

Vulnerability

Moderate vulnerability (43 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