Posidonia Clingfish, Posidonichthys hutchinsi Briggs 1993

A Posidonia Clingfish, Posidonichthys hutchinsi, from Flinders, Western Port, Victoria, March 2016. Source: Kevin Conway / Texas A&M University. License: All rights reserved


A small pale greenish to bluish clingfish with fine spots forming dark reticulations on the back and sides, larger blue spots often on the back, and a pinkish to brown line from the snout to the gill cover. Posidonia Clingfish have a large triangular head with a prominent posteriorly-directed spine on the side of the head near the gill opening.

Cite this page as:
Dianne J. Bray, Posidonichthys hutchinsi in Fishes of Australia, accessed 04 Jul 2020,

Posidonia Clingfish, Posidonichthys hutchinsi Briggs 1993

More Info


Endemic to southern Australia, from Corner Inlet, Victoria, to Rottnest Island, Western Australia, in depths to 10 metres.
Found on macroalgae and in seagrass beds, especially the leaves of Posidonia australis. 


Dorsal fin 2; Anal fin 2; Pectoral fin 16-18; Caudal fin ~10-12; Pelvic fin  I, 4; Vertebrae 32.

Body depressed anteriorly, head large, somewhat triangular with a pointed snout when viewed from above; a prominent posteriorly-directed spine on side of head near gill opening - posterior end usually hidden in flesh near gill opening; gill openings not joined across isthmus. Ventral sucking disc obvious.

Dorsal and anal fins short, far back on body, not joined to caudal fin. 


Pale green to pale blue with many minute, close-packed brown spots forming dark reticulations on the back and sides. Back often with larger blue spots. A pale pink to brown line usually on side of snout running through eye to preopercular border. Juveniles are usually translucent with green bars across the back.


Gravid females have a conspicuously swollen body.


Posidonichthys is after Posidonia, the seagrass on which the species occur (which is named after Poseidon, the ancient Greek god of the sea), and the Greek ichthys meaning 'fish'. The species is named for Dr Barry Hutchins, former Curator of Fishes at the Western Australian Museum.

Species Citation

Posidonichthys hutchinsi Briggs, 1993, Copeia 1993(1): 196, figs 1-2.
Type locality: Fiddlers Bay, south of Tumby Bay, South Australia.


Dianne J. Bray

Posidonia Clingfish, Posidonichthys hutchinsi Briggs 1993


Briggs, J.C. 1993. New genus and species of clingfish (Gobiesocidae) from southern Australia. Copeia 1993(1): 196-199 figs 1-2

Hutchins, J.B. 2008. Family Gobiesocidae. pp. 722-741 in Gomon. M.F., Bray, D.J. & Kuiter, R.H (eds). Fishes of Australia's Southern Coast. Sydney : Reed New Holland 928 pp.

Quick Facts

CAAB Code:37206019

Depth:0-10 m

Habitat:Seagrass beds, macroalgae

Max Size:2.5 cm TL


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