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Skipjack tuna
(Katsuwonus pelamis)

Countable characteristics

D XV~XVIII-II, 12~14 + 8
A II, 13~15 + 6~7
P1 26~28
P2 I, 5
GR 56~65

Distribution

Wolrdwide / Temperate and tropical area

Maximum size

FL　110 cm

Notes

Size and appearence

↑　FL 35 cm

Sample collected in Japan

↑　FL 45 cm

Sample collected in Japan

↑　FL 52 cm

Sample collected in Japan

Example of Size (FL) and weight relationship

Following equation of PIFSC Administrative report: (Updated Weight-on-Length Relationships for Pelagic Fishes Caught in the Central North Pacific Ocean and Bottom fishes from the Northwestern Hawaiian Islands)

FL (cm)	BW (kg)
30	0.5
31	0.5
32	0.6
33	0.7
34	0.7
35	0.8
36	0.9
37	0.9
38	1
39	1.1
40	1.2
41	1.3
42	1.4
43	1.5
44	1.7
45	1.8
46	1.9
47	2.1
48	2.2
49	2.4
50	2.5
51	2.7
52	2.9
53	3
54	3.2
55	3.4
56	3.6
57	3.8
58	4.1
59	4.3
60	4.5
61	4.8
62	5.1
63	5.3
64	5.6
65	5.9
66	6.2
67	6.5
68	6.8
69	7.2
70	7.5
71	7.9
72	8.2
73	8.6
74	9
75	9.4
76	9.8
77	10.2
78	10.7
79	11.1
80	11.6
81	12.1
82	12.6
83	13.1
84	13.6
85	14.1
86	14.7
87	15.2
88	15.8
89	16.4
90	17
91	17.6
92	18.3
93	18.9
94	19.6
95	20.3
96	21
97	21.7
98	22.4
99	23.2
100	23.9

Early life stage

カツオ_IMG_0420re.jpg

↑　SL 6 mm
Species confirmed by DNA,
FRA Japan

カツオ_SHU2103_P7060029re.jpg

↑　FL 25 mm
Species confirmed by DNA, FRA Japan

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