The Australian bonito, horse mackerel, or little bonito, Sarda australis is a ray-finned fish of the family Scombridae. It is found in southeastern Australia and New Zealand. They swim in open water reaching depths of approximately , but probably can also dive deeper. Its length is commonly at around fork length and weight. Its maximum length and weight are about and , respectively.
The Australian bonito is a minor commercial species and an important target for recreational fisheries (angling).