Johnius glaucus   (Day,  1876) (Fish)
Organism information awaits expert curation
Class: Actinopterygii

Image copyrights: FAO

Size: Maximum 30 cm; common to 20 cm.

Color: Body dorsally grey; upper two-thirds of spinous part of dorsal fin black, opercle with a blue blotch.

A medium sized species with a deep body, its depth about 3 times in standard length. Snout projecting, mouth inferior; no barbel on chin; rostral pores 5, marginal pores 5, lower jaw with 5 mental pores; teeth differentiated in size in upper jaw only, the large teeth close-set and forming the outer row; uniform villiform teeth in lower jaw; sagitta (large earstone) with a tadpole-shaped impression of which the "head" lies obliquely and the "tail" is expanded and deepened as a hollow cone; gillrakers short, with simple curved spines on both sides, 10 to 13 on lower limb of first arch. Dorsal fin with 10 spines, followed by a deep notch, second part of fin with 1 spine and 28 to 30 soft rays; pectoral fins about 3/4 of head length; anal fin with 2 spines and 7 soft rays, the second spine weak, about 1/3 of head length; caudal fin rhomboid; scales on body ctenoid (rough to touch); lateral line scales reaching to tip of caudal fin. Swimbladder hammer-shaped, with 14 or 15 pairs of arborescent appendages, the first branching in the head.

Synonym (s)
Sciaena dussumieri (not Cuvier and Valenciennes): Day, 1865
Sciaena glaucus Day, 1878

Common Name (s)
• Pale Spotfin Croaker (English)
• Silver Jew Fish (English)
• Drum Croaker (English)
• Dhoma
Economic Importance and Threats
Importance:  Commercial
(Marketed fresh and dried salted.)

Habitat:  Muddy, Coastal


• Maharashtra, Amba Estuary INDIA
• Northwest Coast INDIA
• Gujarat, Off Kandla INDIA (Record: 1986-1987)
• Gujarat INDIA
• Maharashtra, Mumbai INDIA
• Gujarat, Veraval INDIA
• North West Coast INDIA
• Andhra Pradesh, Off Visakhapatnam (Lat: 17.73) (Long: 83.55) INDIA (Record: 04/1989-03/1990) (Depth: 50 mts)

Literature Source(s)
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Gajbhiye, SN; Mehta, P; Mustafa, S and Nair, VR (1995) A case study on the impact of industrial effluents disposal on the fisheries of Amba river estuary, Maharastra Journal of the Indian Fisheries Association Indian Fisheries Association 25 25-38 Available at -
  • Froese, R and Pauly, D (2000) Fishbase 2000: Concepts, design and data sources ICLARM 344 pp Available at -
  • Fischer, W and Bianchi, G (Eds.) (1984) FAO species identification sheets for fishery purposes. Western Indian Ocean (Fishing Area 51) FAO, Rome 4 Available at -
  • Nair, VR; Govindan, K; Ramaiah, N and Gajbhiye, SN (1993) Fishery potential of the Gulf of Kachchh Journal of the Indian Fisheries Association Indian Fisheries Association 23 91-103 Available at -
  • Kizhakudan, SJ; Nair, KVS and Zala, MS Demersal Finfish Resources of Gujarat Sustainable fisheries development: Focus on Gujarat 57-66 Available at -
  • Dholakia, AD (2004) Marine resources Fisheries and aquatic resources of India Daya publishing house 271-303 Available at - NIO, Goa
  • Biswas, KP (2009) Fishes around Indian Ocean Sciaenid Fishes Daya publishing house Available at - NIO,Goa
  • Sujatha, K (1995) Finfish constituents of trawl by-catch off Visakhapatnam Fishery Technology Society of Fisheries Technologists 32(1) 56-60 Available at - NIO, Goa
  • Biswas, KP (2009) Fishes around Indian Ocean Dominant Fish Groups Occurring in Indian Coasts Daya publishing house Available at - NIO,Goa

Page last updated on:2012-01-05

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