PORT PHILLIP BAY


Alison's Blue Devil 

Paraplesiops alisonae Hoese & Kuiter, 1984

View scientific description and taxonomy

Scientific Details

Meristics.
Dorsal fin spines/rays: XI-XII, 9-11
Anal fin spines/rays: III, 9-11
Caudal fin rays: 17-18
Pectoral fin rays: 17-18
Ventral fin spines/rays: I, 4
Lateral line: 34-38 + 12-16

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.
Small to medium-sized fishes with a deep tail base, a blunt rounded head, smooth scales on head, rough on body; lateral line in 2-3 sections, long-based dorsal fin undivided; pelvic fins with one spine and 2 or 4 soft rays, 1st ray thickened. Most hide in crevices, caves and amongst coral on reefs, except for some plankton feeders, rarely venture from shelter. Many feed at night to feed on small invertebrates and occasionally on fishes. Parents care for the eggs, either attaching them to rocks, guarding them in small holes or caves, or brooding them in their mouths.

Taxonomy

Phylum:
Chordata
Subphylum:
Craniata
Superclass:
Gnathostomata
Class:
Actinopterygii
Order:
Perciformes
Family:
Plesiopidae
Genus:
Paraplesiops
Species:
alisonae

General Description

Body moderately long, compressed, head bluntly rounded, mouth reaching to hind margin of eye; dorsal and anal fins slightly elongated posteriorly, almost reaching to the end of the large rounded tail, slender pelvic fins and lateral line in two parts. Head dark grey to orange with deep blue spots, body greyish with faint darker bars, blue lines on fins. To 15 cm.

Biology

This colourful species hides in caves, crevices and under ledges during the day, becoming active at night.

Habitat

Found beneath ledges and in caves on coastal rocky reefs, in depths of 3-35 m.

Reefs

Distribution guide

South-eastern Australia, including western and central Victoria.

Species Group

Fishes Blue devils and hulafishes

Depth

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

Water Column

On or near sea floor

Max Size

15 cm

Diet

Carnivore

Commercial Species

No

Global Dispersal

Native to Australia

Conservation Status

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

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, Alison's Blue Devil, Paraplesiops alisonae, in Taxonomic Toolkit for marine life of Port Phillip Bay, Museum Victoria, accessed 25 Oct 2014, http://portphillipmarinelife.net.au/species/6438

Text: creative commons cc by licence