Johnius diacanthus   (Lacepede,  1802) (Fish)
Organism information awaits expert curation
Class: Actinopterygii

Image copyrights: The Nature Conservation and Aquatic Sciences Service

Size: 115 mm

Color: Brownish with blackish spots on back, lighter below. Dorsal yellowish with black spots; pectoral, ventral and anal brownish; caudal fin with irregular black spots.

Head 3 in standard length, 3.7 in total length. Depth of body 3.6 in standard length, 4.4 in total length. Eye diameter 5.3 in head, 1.25 in snout and also in convex interorbital space. Free border of snout with lateral incision. Maxillary reaching below hind border of eye. Mandibulary symphysis with a median tubercle in a groove and two pores on either side. Preopercle denticulate, opercle with two weak spines. Teeth in villiform bands in upper jaw with an outer row of conical teeth; lower jaw with a row of villiform teeth and an inner row of lightly larger teeth. Soft dorsal and anal with a low scaly sheath. Pectoral fin longer than postorbital length of head, ventral slightly shorter.
Number of spines and rays in the dorsal fin: X, I, 24; number of spines and rays in the anal fin: II, 7; number of rays in the pectoral fin: 18; number of spines and rays in the ventral fin: I, 5; number of scale rows along the lateral line: 51; number of horizontal scale rows usually counted from origin of the dorsal fin to the lateral line and from anal origin to the lateral line: 8+1+17.

Remarks: Values in above description denote proportions.

Synonym (s)
Lutjanus diacanthus Lacepede, 1802
Johnius diacanthus Fowler, 1926
Pseudosciaena diacanthus Weber and de Beaufort, 1936
Sciaena diacanthus Day, 1878

Common Name (s)
Economic Importance and Threats

Habitat:  Demersal


• Lakshadweep, Kavaratti INDIA
• Lakshadweep INDIA
• Gujarat, Off Kandla INDIA (Record: 1986-1987)
• Off South West Coast INDIA (Record: 01/1962-12/1968) (Depth: 10-75 mts)

Literature Source(s)
  • Wafar, MVM (2003) Checklists of reef fauna Available at -
  • Jones, S and Kumaran, M (1980) Fishes of the Laccadive Archipelago The Nature Conservation and Aquatic Sciences Service, Trivandrum, Kerala 760 pp Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) 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 -
  • Silas, EG (1969) Part-1 Exploratory otter trawling surveys by R.V. Varuna and other vessels operating in association with her from the continental shelf edge and the upper continental slope off the south-west coast of India Exploratory fishing by R.V. Varuna Bulletin Of Central Marine Fisheries Research Institute CMFRI, Cochin 12 7-51 Available at -

Page last updated on:2011-05-20

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