Mackerel tuna are stubborn fighters when hooked, and can be recognised by a distinct and striking pattern of broken zig-zaggy lines on the upper sides of their bodies, and two or five dark spots above the pelvic fin.
They are in the Scombridae family which includes all mackerel, tuna and bonito.
Macks hunt in large schools to round up baitfish and then smash into them as a gang.
Macks can be regarded as both abundant and elusive at the same time. Abundant in that a feeding school could easily cover an area of 100 square metres or more, and elusive in that getting close enough to them to cast your line near them without spooking them can be very difficult as these fish spook easily.
Recently there have been reports of loads of mackerel tuna in the Exmouth Gulf. These schools have been so large that anglers have been able to successfully get in fly fishing range without spooking them off, which is how these pictured macks were caught!