Twinspot Rockskipper, Entomacrodus thalassinus (Jordan & Seale 1906)

Other Names: Reef Margin Blenny, Sea Blenny, Twinspots Blenny

Twinspot Rockskipper, Entomacrodus thalassinus. Source: Barry Hutchins / Western Australian Museum. License: All rights reserved

Cite this page as:
Bray, D.J. 2017, Entomacrodus thalassinus in Fishes of Australia, accessed 03 Mar 2024,

Twinspot Rockskipper, Entomacrodus thalassinus (Jordan & Seale 1906)

More Info


North West Cape to Kendrew Island, Western Australia. Elsewhere the species occurs in the tropical Seychelles and Comoros in the western Indian Ocean, to the Line and Tuamoto Islands in the central Pacific, north to southern Japan, south to the Great Barrier Reef, and throughout Micronesia.

Species Citation

Alticus thalassinus Jordan & Seale 1906, Bull. Bur. Fish. (U.S.) 1905 25: 425, fig. 103. Type locality: Apia, Samoa.


Bray, D.J. 2017


Australian Faunal Directory

Twinspot Rockskipper, Entomacrodus thalassinus (Jordan & Seale 1906)


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. & 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. 

Hastings, P. & Springer, V.G. 2009. Recognizing diversity in blennioid fish nomenclature (Teleostei: Blennioidei). Zootaxa 2120: 3-14. 

Jordan, D.S. & Seale, A. 1906. The fishes of Samoa. Description of the species found in the Archipelago, with a provisional checklist of the fishes of Oceania. Bulletin of the Bureau of Fisheries (U.S.) for 1905 25: 173-455 figs 1-111 pls 33-53 

Schultz, L.P. & Chapman, W.M. 1960. Subfamily Salarinae. pp. 302-382 in Schultz, L.P., Chapman, W.M., Lachner, E.A. & Woods, L.P. (eds) Fishes of the Marshall and Marianas Islands. Vol. 2. Families Mullidae through Stromateidae. Bulletin of the United States National Museum 202(2): 1-438, figs 91-132, pls 75-123

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 Open access

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

Williams, J.T. 2014. Entomacrodus thalassinus. The IUCN Red List of Threatened Species 2014: e.T48342265A48394675. Downloaded on 15 January 2017.

Quick Facts

CAAB Code:37408038

Conservation:IUCN Least Concern

Depth:0-11 m

Habitat:Reef associated

Max Size:4 cm SL

Species Image Gallery

Species Maps

CAAB distribution map