The only time I have ever eaten mack tuna was at the Mackerel Islands one year when a Greek friend baked one up with garlic and vegetables – it tasted pretty good too, given that it looked so bloody and uninviting when he prepared it.Most readers will have eaten mack tuna in its canned form.ack tuna are members of the very important family Scombridae that includes all mackerel, tuna and bonito. Size. The Australian all-tackle game fishing record stands at 11.8 kilos, taken in Queensland back in 1973. The West Australian record is a bit smaller at 8.9 kilos taken off Exmouth in 1995 by Geoff Moyle.