Gillblotch Leatherjacket, Pervagor janthinosoma (Bleeker 1854)

Other Names: Ear-spot Filefish, Gill-blotch Leatherjacket, Redtail Leatherjacket, Red-tailed Leatherjacket

A Gillblotch Leatherjacket, Pervagor janthinosoma, in Chowder Bay, Sydney Harbour, New South Wales, April 2016. Source: John Turnbull / Flickr. License: CC by Attribution-NonCommercial-ShareAlike

An easily recognised leatherjacket with a blackish to dark bluish blotch or bar around the gill opening in front of the pectoral-fin base. Males also have a blue area on the side of the snout and lower head, a blue stripe on the pelvic flap, blue spots on the pectoral-fin base and on the dorsal and anal fins.

Cite this page as:
Bray, D.J. 2018, Pervagor janthinosoma in Fishes of Australia, accessed 20 Jun 2024,

Gillblotch Leatherjacket, Pervagor janthinosoma (Bleeker 1854)

More Info


Recorded in the Australian EEZ from the Houtman Abrolhos to the Dampier Archipelago, Western Australia, and from the Murray Islands, Queensland, to at least Shellharbour, New South Wales, with juveniles further south. Also at Middleton Reef, Lord Howe Island and Norfolk Island in the Tasman Sea. Found elsewhere in the tropical Indo-West Pacific.
Inhabits lagoon and seaward reefs in depths of 1-20 m.


Dorsal fin I-II + 29-34; Anal fin 26-30. 
Scale spinulation at midbody closely packed. Male scale ridge rugosities develop at about 8 cm SL. Strong first dorsal-fin spine. Large pelvic-fin rudiment narrowly attached to posterior margin of ventral flap.

Species Citation

Monacanthus janthinosoma Bleeker, 1854, Natuurwetensch. Tijdschr. Nederland. Indië 6: 504. Type locality: Ambon, Indonesia.


Bray, D.J. 2018


Australian Faunal Directory

Gillblotch Leatherjacket, Pervagor janthinosoma (Bleeker 1854)


Allen, G.R. 1985. Fishes of Western Australia. Book 9. 2207-2534 526 pls in Burgess, W.E. & Axelrod, H.R. (eds). Pacific Marine Fishes. Neptune, New Jersey : T.F.H. Publications.

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

Bleeker, P. 1854. Vijfde bijdrage tot de kennis der ichthyologische fauna van Amboina. Natuurwetenschappelijk Tijdschrift voor Nederlandsch Indië 6: 455-508.

Francis, M. 1993. Checklist of the coastal fishes of Lord Howe, Norfolk, and Kermadec Islands, southwest Pacific Ocean. Pacific Science 47(2): 136-170 figs 1-2

Gill, A.C. & Reader, S.E. 1992. Fishes. pp. 90-93, 193-228 in Hutchings, P. (ed.). Reef Biology. A Survey of Elizabeth and Middleton Reefs, South Pacific. Canberra : Australian National Parks Vol. 3, Kowari 230 pp.

Hollard, H.L. 1854. Monographie de la famille des balistides. Annales des Sciences Naturelles, Paris 4 2: 321-366 3 figs

Hutchins, J.B. 1986. Review of the monacanthid fish genus Pervagor, with descriptions of two new species. Indo-Pacific Fishes 12: 1-35 11 figs 2 pls 

Hutchins, J.B. 1990. Fish survey of South Passage, Shark Bay, Western Australia. pp. 263-278 in Berry, P.F., Bradshaw, S.D. & Wilson, B.R. (eds). Research in Shark Bay: Report of the France-Australe Bicentenary Expedition Committee. Perth : Western Australian Museum.

Hutchins, J.B. 1994. A survey of the nearshore reef fish fauna of Western Australia's west and south coasts — The Leeuwin Province. Records of the Western Australian Museum, Supplement 46: 1-66 figs 1-6

Hutchins, J.B. 1997. Checklist of fishes of the Houtman Abrolhos Islands, Western Australia. pp. 239-253 in Wells, F.E. (ed.). The Marine Flora and fauna of the Houtman Abrolhos Islands, Western Australia. Perth : Western Australian Museum.

Hutchins, J.B. 2001. Biodiversity of shallow reef fish assemblages in Western Australia using a rapid censusing technique. Records of the Western Australian Museum 20: 247-270.

Hutchins, J.B. 2001. Monacanthidae. pp. 3929-3947 in Carpenter, K.E. & Niem, T.H. (eds). The Living Marine Resources of the Western Central Pacific. FAO Species Identification Guide for Fisheries Purposes. Rome : FAO Vol. 6 pp. 3381-4218.

Hutchins, B. 2004. Fishes of the Dampier Archipelago, Western Australia. Records of the Western Australian Museum, Supplement 66: 343–398.

Hutchins, J.B. & Swainston, R. 1986. Sea Fishes of Southern Australia. Complete field guide for anglers and divers. Perth : Swainston Publishing 180 pp.

Johnson, J.W. 2010. Fishes of the Moreton Bay Marine Park and adjacent continental shelf waters, Queensland, Australia. pp. 299-353 in Davie, P.J.F. & Phillips, J.A. Proceedings of the Thirteenth International Marine Biological Workshop, The Marine Fauna and Flora of Moreton Bay. Memoirs of the Queensland Museum 54(3)

Kuiter, R.H. 1993. Coastal Fishes of South-eastern Australia. Bathurst : Crawford House Press 437 pp.

Randall, J.E., Allen, G.R. & Steene, R. 1990. Fishes of the Great Barrier Reef and Coral Sea. Bathurst : Crawford House Press 507 pp. figs.

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.

Swainston, R. 2011. Swainston's Fishes of Australia: The complete illustrated guide. Camberwell, Victoria : Penguin Australia 836 pp.

Quick Facts

CAAB Code:37465068

Depth:1-20 m

Habitat:Reef associated

Max Size:14 cm TL

Species Image Gallery

Species Maps

CAAB distribution map