Carangoides spp. (island jacks)
Megalaspis cordyla (torpedo scad)
Atule (certain scads)
Alectis indica (Indian threadfish)
Sarda australis (Australian bonito)
Trachurus spp. (jack mackerels).
Gnathanodon speciosus (golden trevally)
Naucrates ductor (pilot fish)
Sarda sarda (Atlantic bonito)
Caranx spp. (certain trevallies)
Selar crumenophthalmus (bigeye scad)
A Jack the lad; a boyo.
A boy or young man.
A groom who works with horses.
The penis.
A familiar term of address for a young man.