Euthynnus affinis affinis   (Cantor,  1860) (Fish)
Organism information awaits expert curation
Class: Actinopterygii

Max. size: 87 cm

Weight: 8.6 kg

Color: Bluish black on head and back and silvery white below. Oblique wavy blackish broken lines running upwards and backwards behind the corselet and above the lateral line. About eight small dark spots on body at pectoral base. Anterior half of each pelvic fin bluish black.

Mouth oblique, jaws with minute conical teeth, palatines and vomers also provided with teeth. Scales on corselet better developed on dorsal hind position. First dorsal is separated from second dorsal by narrow space. Caudal peduncle with median keel and two small keels on either side.

Sexes are separate and the size at first sexual maturity is about 55 cm.

The trematodes Capsula gouri and Rhipidocotyle septapapillata and the copepod Anuretes sp. are parasitic on this species.

Synonym (s)
Thynnus affinis Cantor 1850
Thynnus thunnina Day 1889
Euthynnus alleteratus affinis Munro 1958
Euthynnus affinis Munro 1955
Euthynnus affinis affinis Fraser-Brunner 1949

Common Name (s)
• Little Tunny (English)
• Mackerel Tuna (English)
• Suraly (Tamil)
Economic Importance and Threats

Trophic Level:  Consumer
Prey:  Molluscs (squids, cuttle fish and pteropods), fish (anchovies, silverbellies, carangids, etc.) and crustaceans (stomatopods larvae, penaeid prawns, phyllosoma larvae and larvae of other decapod species)
Predator:  Stripes marlins and big sharks


• INDIA (Record: 1984)
• Lakshadweep INDIA (Record: 1984)
• Andaman and Nicobar Islands, Andamans INDIA (Record: 1984)
• SRI LANKA (Record: 1984)
• MADAGASCAR (Record: 1984)
• MALDIVES (Record: 1984)
• MAURITIUS (Record: 1984)
• SEYCHELLES (Record: 1984)
• Andaman and Nicobar Islands INDIA

Literature Source(s)
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Bal, DV and Rao, KV (1984) Marine fisheries Tata McGraw-Hill Publishing Company Limited 470 pp Available at - NIO, Goa
  • Jones, S; Silas, EG and Dawson, E (1960) New records of scombroid fishes from the Andaman-Nicobar waters Journal of the marine biological association of India The marine biological association of India 2(1) 130-133 Available at -

Page last updated on:2011-03-30

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