Blackspotted Rockskipper, Entomacrodus striatus (Valenciennes 1836)

Other Names: Pearly Rockskipper, Reef Margin Blenny, Streaked Blenny, Striated Blenny

A Blackspotted Rockskipper, Entomacrodus striatus, at the Mildura Wreck, North West Cape, Western Australia, March 2020. Source: Alex Hoschke / License: CC BY Attribution-Noncommercial


A whitish goby with dark spots in 6-7 clusters along the side, and saddles of dark spots along the back, and a pale upper lip with scattered spots. This small herbivorous goby lives in the intertidal zone of coral and rocky reefs. Individuals skip across the reef platform, and shelter in small pools left by the receding tide.

Cite this page as:
Bray, D.J. & Bray, R.D. 2022, Entomacrodus striatus in Fishes of Australia, accessed 21 Mar 2023,

Blackspotted Rockskipper, Entomacrodus striatus (Valenciennes 1836)

More Info


Rottnest Island to the Dampier Archipelago, Western Australia, and the Herald Group in the Coral Sea to Stradbroke Island, Queensland; also Coco-Keeling Islands in the eastern Indian Ocean, and the Lord Howe Province and Norfolk Island in the Tasman Sea. Elsewhere the species is widespread in the tropical, Indo-west-central Pacific.
Inhabits the intertidal zone of lagoons and wave-swept seaward reefs, sheltering in small pockets of water left behind on the reef during low tide.


Dorsal fin XII-XIV, 14-16; Anal fin II, 15-18; Pectoral fin 14; Pelvic fin I,4.

Nape with a single cirrus on each side; supraorbital tentacle with 1-20 cirri; anterior nostril with cirri on rear part; margin of upper lip usually crenulate.


To 11 cm TL (total length).


IUCN Red List of Threatened Species: Least Concern


The specific name is from the Latin striatus (= striated, striped).

Species Citation

Salarias striatus Valenciennes, in Cuvier & Valenciennes 1836, Histoire Naturelle des Poissons Vol. 11: 309. Type locality: Mauritius (as Isle-de-France).


Bray, D.J. & Bray, R.D. 2022


Atlas of Living Australia

Blackspotted Rockskipper, Entomacrodus striatus (Valenciennes 1836)


Allen, G.R. 1997. Marine Fishes of Tropical Australia and South-east Asia. Perth : Western Australian Museum 292 pp. 106 pls.

Allen, G.R. & Erdmann, M.V. 2012. Reef fishes of the East Indies. Perth : Tropical Reef Research 3 vols, 1260 pp.

Allen, G.R. & Smith-Vaniz, W.F. 1994. Fishes of the Cocos (Keeling) Islands. Atoll Research Bulletin 412: 21 pp.

Allen, G.R. & Swainston, R. 1988. The Marine Fishes of North-Western Australia. A field guide for anglers and divers. Perth, WA : Western Australian Museum vi 201 pp., 70 pls

Francis, M.P. 1993. Checklist of the coastal fishes of Lord Howe, Norfolk, and Kermadec Islands, Southwest Pacific Ocean. Pacific Science 47(2): 136-170.

Hoschke, A., Whisson, G. & Moore, G.I. 2019. Complete list of fishes from Rottnest Island. pp. 150-161 in Whisson, G. & Hoschke, A. (eds). The Rottnest Island fish book. 2nd ed. Perth, Western Australia : Aqua Research and Monitoring Services.

Myers, R.F. 1999. Micronesian reef fishes: a comprehensive guide to the coral reef fishes of Micronesia. 3rd revised and expanded edition. Coral Graphics, Barrigada, Guam. 330 pp.

Ogilby, J.D. 1889. The reptiles and fishes of Lord Howe Island. Memoirs of the Australian Museum 2(3): 51-74 pls 2-3 (misidentified as Salarias marmoratus)

Randall, J.E. 2005. Reef and shore fishes of the South Pacific. New Caledonia to Tahiti and the Pitcairn Islands. Honolulu : University of Hawaii Press 707 pp.

Randall, J.E., Allen, G.R. & Steene, R. 1997. Fishes of the Great Barrier Reef and Coral Sea. Bathurst : Crawford House Press 557 pp. figs

Springer, V.G. 1967. Revision of the circumtropical shore-fish genus Entomacrodus (Blenniidae : Salariinae). Proceedings of the United States National Museum 122(3582): 1-150. See ref at BHL

Springer, V.G. 1972. Additions to revisions of the blenniid fish genera Ecsenius and Entomacrodus, with descriptions of three new species of Ecsenius. Smithsonian Contributions to Zoology 134: 1-13.

Watson, W. 2009. Larval development in blennies. pp. 309-350. In Patzner, R.A., E.J. Gonçalves, P.A. Hastings & B.G. Kapoor (eds) The biology of blennies. Science Publishers, Enfield, NH, USA. 482 pp.

Williams, J.T. 2014. Entomacrodus striatus. The IUCN Red List of Threatened Species 2014: e.T48342213A48393364. Downloaded on 17 August 2016.

Quick Facts

CAAB Code:37408037

Conservation:IUCN Least Concern

Depth:0-5 m

Habitat:Intertidal, coral & rocky reefs

Max Size:11 cm TL

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Species Maps

CAAB distribution map