i Day, 1884, 2: 259, pl. CXLIV (fig. I) (part) | Jenkins, 1936: 209, pl. 84 (fig. 2) (text in part). – synonym of Syngnathus rostellatus
i: d'Ancona, 1934: 65, pl. II (fig. 19), pl. III (fig. 10) | Svetovidov, 1964: 188, fig. 53. – synonym of Syngnathus schmidti
i: Fowler, 1936: 462 | Trotti, 1947: 41 | Lozano Rey, 1960: 336, fig. 122 (after Valenciennes). – synonym of Nezumia sclerorhynchus
ibakoura [Tunesia, Algeria, Morocco] – synonym of Euthynnus alletteratus
Iceland catshark [UK and USA] – synonym of Apristurus laurussonii
icèle à deux cornes [France and Belgium] – synonym of Icelus bicornis
icèle spatulée [France and Belgium] – synonym of Icelus spatula
iglan [former Yugoslavia] – synonym of Tetrapturus belone
iglica [former Yugoslavia] – synonym of Belone belone
iglica [former Yugoslavia] – synonym of Belone svetovidovi
ijshaai [Netherlands and Belgium] – synonym of Somniosus microcephalus
IJslandse bandvis [Netherlands and Belgium] – synonym of Lumpenus lampretaeformis
imperial blackfish [UK and USA] – synonym of Schedophilus ovalis
indian flathead [UK and USA] – synonym of Platycephalus indicus
Indian mackerel [UK and USA] – synonym of Rastrelliger kanagurta
Indian sabretooth [UK and USA] – synonym of Evermannella indica
ingue bleue [France and Belgium] – synonym of Molva dipterygia
italian grenadier [UK and USA] – synonym of Hymenocephalus italicus