Smooth Jewfish, Johnius laevis Sasaki & Kailola 1991

Other Names: Coitor Croaker, Smooth Croaker

Smooth Jewfish, Johnius laevis. Source: Australian National Fish Collection, CSIRO. License: CC by Attribution-NonCommercial

Cite this page as:
Bray, D.J. 2018, Johnius laevis in Fishes of Australia, accessed 22 Jun 2024,

Smooth Jewfish, Johnius laevis Sasaki & Kailola 1991

More Info


Northern Australia from the Bonaparte Archipelago, Western Australia, to off Port Essington, Northern Territory, and southern Papua New Guinea.


Feeds on small crustaceans, fish and benthic invertebrates.


Taken as bycatch in prawn trawl fisheries.


The specific name laevis (smooth) refers to the smooth touch of the body, due to the poorly developed ctenii on the scales.

Species Citation

Johnius (Johnius) laevis Sasaki & Kailola 1991. Japan. J. Ichthyol. 38(2): 119, figs 1- 2. Type locality: off Port Essington, Northern Territory.


Bray, D.J. 2018


Australian Faunal Directory

Smooth Jewfish, Johnius laevis Sasaki & Kailola 1991


Chao, N.L. & Sasaki, K. 2010. Johnius laevis (errata version published in 2017). The IUCN Red List of Threatened Species 2010: e.T154704A115225202. Downloaded on 02 July 2018.

Gloerfelt-Tarp, T. & Kailola, P.J. 1984. Trawled Fishes of Southern Indonesia and Northwest Australia. Jakarta : Dir. Gen. Fish. (Indonesia), German Tech. Coop., Aust. Dev. Ass. Bur. 406 pp. (as Johnius coitor)

Sainsbury, K.J., Kailola, P.J. & Leyland, G.G. 1984. Continental Shelf Fishes of Northern and North-Western Australia. Canberra : Fisheries Information Service 375 pp. figs & pls. (as Johnius coitor)

Sasaki, K. 2001. Sciaenidae. pp. 3117-3174 in Carpenter, K.E. & Niem, V.H. (eds) The Living Marine Resources of the Western Central Pacific. FAO Species Identification Guide for Fisheries Purposes. Rome : FAO Vol. 5 2791-3379 pp.

Sasaki, K. & Kailola, P.J. 1991. Johnius (Johnius) laevis, a new sciaenid from northern Australia and Papua New Guinea. Japanese Journal of Ichthyology 38(2): 119-123 figs 1-3

Tonks, M.L., Griffiths, S.P., Heales, D.S., Brewer, D.T. & Dell, Q. 2008. Species composition and temporal variation of prawn trawl bycatch in the Joseph Bonaparte Gulf, northwestern Australia. Fisheries Research 89(3): 276–293.

Quick Facts

CAAB Code:37354004

Conservation:IUCN Data Deficient

Depth:5-60 m

Habitat:Coastal waters

Max Size:14 cm SL

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