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Guide for identification of IOTC species

Indo-Pacific sailfish
(Istiophorus platypterus)

Countable characteristics

D XXXXII~XXXXVII -6~7
A XII~XV -6~7
P1 17~20
P2 I, 2

Distribution

Worldwide / Temperate and tropical area

Maximum size

Around 200 cm (Total Length), 50 kg

Notes

Easly identified by long and flat body. Body shape is similar to Shortbill spearfish but anal position is clearly different.

Characteristics of the body

SFA_2nd dorsal anal.jpg

↑　Posiiton of 2nd dorsal fin and anal fin

SFA_anal position.jpg

↑　Anal fin position

↑　Shape of the 1st dorsal fin

Example of Size (EyeFL) 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)

Eye FL (cm)	BW (kg)
90	5.9
91	6.1
92	6.3
93	6.4
94	6.6
95	6.8
96	7
97	7.1
98	7.3
99	7.5
100	7.7
101	7.9
102	8.1
103	8.3
104	8.5
105	8.7
106	8.9
107	9.2
108	9.4
109	9.6
110	9.8
111	10
112	10.3
113	10.5
114	10.7
115	11
116	11.2
117	11.5
118	11.7
119	12
120	12.2
121	12.5
122	12.7
123	13
124	13.3
125	13.6
126	13.8
127	14.1
128	14.4
129	14.7
130	15
131	15.3
132	15.6
133	15.9
134	16.2
135	16.5
136	16.8
137	17.1
138	17.4
139	17.7
140	18
141	18.4
142	18.7
143	19
144	19.4
145	19.7
146	20.1
147	20.4
148	20.8
149	21.1
150	21.5
151	21.8
152	22.2
153	22.6
154	23
155	23.3
156	23.7
157	24.1
158	24.5
159	24.9
160	25.3
161	25.7
162	26.1
163	26.5
164	26.9
165	27.3
166	27.7
167	28.2
168	28.6
169	29
170	29.5
171	29.9
172	30.3
173	30.8
174	31.2
175	31.7
176	32.2
177	32.6
178	33.1
179	33.6
180	34
181	34.5
182	35
183	35.5
184	36
185	36.5
186	37
187	37.5
188	38
189	38.5

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