Isurus glaucus   (Muller & Henle,  1839) (Fish)
Organism information awaits expert curation
Class: Elasmobranchii

Image copyrights: The Nature Conservation and Aquatic Sciences Service

Size: 1005 mm

Color: Dark blue above, white below, the two colors sharply contrasted. Dorsal fins, caudal and pectoral dark blue; ventral and anal bluish grey.

Robust fusiform body with sharply pointed snout and depressed caudal peduncle. Head about 4 to subcaudal origin. Depth of body 6.7 to subcaudal origin. Eye about 12 in head. Mouth as long as wide. Angle of mouth midway between tip of snout and second gill opening. No nictitating membrane. Labial folds present. Teeth lanceolate, 22 in each jaw, edges sharp and entire, no cusps. Gill openings before pectoral. Gill openings shorter than snout. Spiracles small. A notch at caudal base above and a strong keel on each side of caudal peduncle. First dorsal insertion midway between tip of snout and second dorsal. Height of first dorsal slightly more than snout and eye. Length of pectoral 1.7 times the height of first dorsal fin. Ventral nearer to caudal base than to pectoral insertion. Second dorsal and anal small. Anal nearer to base of caudal than to ventral and behind vertical from second dorsal. Lower caudal lobe 2/3 of upper lobe.

Remarks: Values in above description denote proportions.

Synonym (s)
Oxyrhina glauca Muller and Henle, 1838
Isurus glaucus Smith, 1949
Lamna spallanzanii Day, 1878

Common Name (s)
• Vorimasmiyaru
Economic Importance and Threats



• Lakshadweep, Minicoy INDIA (Record: 1980)
• Tamil Nadu, Porto Novo INDIA

Literature Source(s)
  • 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 -
  • Devadoss, P (1984) Nutritive values of sharks, skates and rays from Portonovo coast Indian Journal of Fisheries 31 (1) 156-161 Available at -

Page last updated on:2011-07-20

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