The Mackerel tuna is a species of smaller tuna that has gained the reputation of being a feisty little rough sea battler with poor table qualities. They are commonly encountered by anglers trolling skirted lures and make for great sport when hooked on ultra light line classes. Mack tuna are full of blood and it is said that if they grew to larger sizes would be practically unstoppable due to their incredible stamina. They are also referred to as Kawa, Kawa tuna which is a naming that has descended from Hawaiian customs. Tuna are the only species of fish in our entire oceans that are designed to produce perpetual motion from birth until death. As long as their hearts are beating so are their tails! All tuna species need to swim at least 3 times their body length per second to survive.