Katsuwonus pelamis   (Linnaeus,  1758) (Fish)
Organism information awaits expert curation
Class: Actinopterygii

Image copyrights: Mya Than Tun

Size: 40-110 cm.

Max. weight reported: 34.5 kg

Color: Dark bluish above, yellowish white below. Four to six longitudinal dark bands on lower half of body. Spinous dorsal pale with dark edges. Second dorsal dusky gray. Pectoral dark, lower rays lighter. Ventral dusky gray, inner rays lighter.

Head 3.1-3.4 in standard length, 3.4-3.7 in total length. Depth of body 3.8-4.1 in standard length, 4.2-4.5 in total length. Eye diameter 5.7-7.0 in head, 1.6-2.0 in snout and 1.4-1.7 in interorbital space. Maxillary extending to below anterior 2/5 of eye. Jaws with small conical teeth. Vomer and palatines edentulous. First and second dorsal fins separated only by a narrow interspace not exceeding eye diameter. First dorsal spine almost equal to postorbital length of head, following spines gradually becoming shorter. Dorsal and anal low, anterior rays longer. Anal fin insertion slightly behind that of dorsal. Pectoral fin shorter than postorbital length of head. Body except corselet and lateral line naked. Corselet well developed, scales on front part of back and above pectoral larger than others.
Number of spines in the first dorsal fin: XV-XVI; number of spines and rays in the second dorsal fin: 14-15+8; number of spines and rays in the anal fin: 15+7; number of rays in the pectoral fin: 26-27; number of spines and rays in the ventral fin: I, 5; gill raker count: 14-17+34-39.
Body robust, deep but tapering strongly posteriorly. Head somewhat compressed and convex above. Snout long and pointed. Mouth oblique. Maxillary reaching nearly or quite opposite middle of eye. Teeth in single series on jaws but not on palatine and vomer. First dorsal originating a little behind insertion of pectoral. Spines in the first dorsal slender, the anterior ones long and the posterior ones short. Second dorsal somewhat elevated with deep concave margin. Origin of anal slightly in advance of vertical from the base of last ray of second dorsal. Ventral shorter than pectoral. Lateral line curved below second dorsal, then passing straight to caudal base. Trunk naked except corselet and lateral line. Caudal with a strong lateral keel. Caudal fin lunate.

Normally heterosexual. Dioecious, external fertilization, nonguarders, open water/substratum egg scatterers. Spawn throughout the year. In tropical waters, reproductively active female skipjack tuna spawn almost daily. Eggs and larvae are pelagic.

Max. age reported: 12 years

Remarks: Values in above description denote proportions.

Synonym (s)
Euthynnus pelamis (Linnaeus, 1758)
(Senior synonym)
Gymnosarda pelamis (Linnaeus, 1758)
(Senior synonym)
Katsuwonus pelamis (Linnaeus, 1758)
(Senior synonym)
Orcynus pelamis (Linnaeus, 1758)
(Senior synonym)
Scomber pelamides Lacepede, 1801
(Junior synonym)
Scomber pelamis Linnaeus, 1758
(Senior synonym)
Thinnus pelamis (Linnaeus, 1758)
(Senior synonym)
Thynnus pelamis (Linnaeus, 1758)
(Senior synonym)
Thynnus vagans Lesson, 1829
(Junior synonym)
Euthynnus pelamis Smith, 1949
Katsuwonus pelamis Munro, 1955
Katsuwonus pelamys Kishinouye, 1915
Thynnus pelamys Day, 1878
Euthynnus pelamys (Linnaeus, 1758)
Gymnosarda pelamys (Linnaeus, 1758)
Katsowonus pelamis (Linnaeus, 1758)
Katsuwinus pelamis (Linnaeus, 1758)
Katsuwonnus pelamis (Linnaeus, 1758)
Katsuwonus pelamys (Linnaeus, 1758)
Scomber pelamys Linnaeus, 1758
Thunnus pelamys (Linnaeus, 1758)
Thynnus pelamys (Linnaeus, 1758)

Common Name (s)
• Skipjack Tuna (English)
• Striped Tuna (English)
• Bonito (English)
• Oceanic Skipjack (English)
• Skiy Jack (English)
• Stripped Tuna (English)
• Gedar (Gujarati)
• Bokado (Konkani)
• Kalabila Mas (Mahl)
• Choora (Malayalam)
• Bugudi (Marathi)
• Gedar (Marathi)
• Kuppa (Marathi)
• Oceanic Bonito (English)
• Choorai
• Kali-Phila-Das
• Choora and Metti
Economic Importance and Threats
Importance:  Commercial, Dangers
(Fisheries, gamefish. Marketed fresh, frozen or canned also dried-salted and smoked.
Reported to cause ciguatera poisoning.)

Habitat:  Pelagic
Trophic Level:  Tertiary Consumer
Prey:  Fishes, crustaceans, cephalopods and mollusks; cannibalism is common
Predator:  Fishes (Katsuwonus pelamis, Coryphaena hippurus, Makaira indica, Makaira nigricans, billfishes, Acanthocybium solandri, Thunnus albacares, Thunnus obesus, Makaira mazara), sea birds (Anous stolidus, Sterna fuscata), sharks (Carcharhinus albimarginatus, Isurus oxyrinchus, whaler sharks)


• Andhra Pradesh, Vishakhapatnam INDIA (Record: 2004-2006) (Depth: -100 mts)
• Tamil Nadu, Tuticorin INDIA (Record: 1989-2002)
• Lakshadweep, Agatti INDIA
• Lakshadweep, Kalpeni INDIA
• Lakshadweep, Kavaratti INDIA
• Lakshadweep, Minicoy INDIA
• Kerala, Vizhinjam INDIA
• Maharashtra, Ratnagiri INDIA
• Tamil Nadu, Gulf of Mannar INDIA
• Arabian Sea (Lat: 16) (Long: 68.5) INDIA (Record: 02/1985-06/1987) (Depth: 60-300 mts)
• Arabian Sea (Lat: 19) (Long: 70.5) INDIA (Record: 02/1985-06/1987) (Depth: 60-300 mts)
• Lakshadweep INDIA
• West Coast INDIA
• South East Coast INDIA
• Andaman Sea INDIA
• Pondicherry INDIA
• Kerala INDIA
• Tamil Nadu, Tuticorin INDIA
• Andaman and Nicobar Islands INDIA
• Lakshadweep, Minicoy Island (Lat: 8.11) (Long: 73.3) INDIA
• Gujarat, Veraval INDIA
• Andhra Pradesh, Vishakhapatnam INDIA
• Lakshadweep, Minicoy (Lat: 11) (Long: 72.5) INDIA

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Page last updated on:2012-03-13

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