PORT PHILLIP BAY


Bluethroat Wrasse 

Notolabrus tetricus (Richardson, 1840)

View scientific description and taxonomy

Scientific Details

Meristics.
Dorsal fin spines/rays: IX, 11
Anal fin spines/rays: III, 10
Caudal fin rays: 12
Pectoral fin rays: 14
Ventral fin spines/rays: I, 5
Lateral line: 25-26

Interpreting fin count meristics.
Spines are in Roman numerals and soft rays are in Arabic numerals. Spines and rays that are continuous in one fin are separated by a comma. Fin sections are separated by semicolons.

Detailed descriptions of fin count and other meristics are in:
Gomon. M.F., Bray, D.J. & Kuiter, R.H. (eds) (2008) Fishes of Australia's Southern Coast. Sydney : Reed New Holland 928 pp.

Order level detail.
A large and highly diverse group of modern bony fishes many of which have a generalized perch like body form. Most have pelvic fins with one spine and 5 rays and the maxillary bone is excluded from the gape of the mouth. Interrelationships of the group are poorly understood and continue to be studied. They inhabit almost all aquatic habitats from high-altitude strams to the deep sea, although most are marine.

Family level detail.
Usually long, slender colourful fishes with a single long-based dorsal fin, well-developed pectoral fins used for swimming, thick lips, jaws with well-developed canine teeth and crushing molars on the bones at the bases of the gill arches. Many are protogynous hermaphrodites, meaning that they change sex from female to male.

Recent molecular studies indicate the Labridae is not a natural group without the inclusion of the Weed whitings (formerly Odacidae) and Parrotfishes (formerly Scaridae).

Taxonomy

Phylum:
Chordata
Subphylum:
Craniata
Superclass:
Gnathostomata
Class:
Actinopterygii
Order:
Perciformes
Family:
Labridae
Genus:
Notolabrus
Species:
tetricus

General Description

Body moderately deep, snout rounded. Juveniles and females are greenish or brown, paler below, gradually developing a broad dark band on the sides and behind the pectoral fin; scales large with pale centres; as females mature they develop a distinct white band behind the dark band on their sides. Males brown to bluish grey with a bluish head, a blue throat and yellow pectoral and pelvic fins. To 50 cm.

Biology

This is the most common wrasse species in Victorian and Tasmanian waters. It is frequently caught on hook and line, and is also taken in trawls and with commercial gillnets. Bluethroat Wrasse change sex from female to male during their life cycle and are sexually dimorphic in colour.

Habitat

Adults usually on deep exposed rocky reefs, juveniles in shallower weedy areas, in depths of 1-160 m.

Reefs

Distribution guide

South-eastern Australia.

Species Group

Fishes › Wrasses, rock whitings and allies

Depth

Shallow (1-30 m)
Deep ( > 30 m)

Water Column

On or near sea floor

Max Size

50 cm

Commercial Species

Yes

Global Dispersal

Native to Australia

Identify

Conservation Status

  • DSE Advisory List : Not listed
  • EPBC Act 1999 : Not listed
  • IUCN Red List : Least Concern

Author

article author Bray, D.J.

Di Bray is a Senior Collection Manager of ichthyology at Museum Victoria.

Author

article author Gomon, M.F.

Dr. Martin Gomon is a Senior Curator of ichthyology at Museum Victoria.

citation

Cite this page as:
Bray, D.J. & Gomon, M.F., 2011, Bluethroat Wrasse, Notolabrus tetricus, in Taxonomic Toolkit for marine life of Port Phillip Bay, Museum Victoria, accessed 23 Nov 2024, http://136.154.202.208:8098/species/7997

Text: creative commons cc by licence