This story reminds me of a catchy phrase. You wouldn't know a diamond if you held it in your hand, from a classic Steely Dan song.
It almost seems fitting -- After reading the story of this Mako landing in the Keynoter.com website. It turns out that the fish was diced up and thrown back into the water the following day. That family event was certainly a great fish story but what a shame and a waist of a fantastic fish!
I have not yet had fresh caught Mako but I understand that it is an excellent eating fish. So the next time someone lands a Mako and decides to kill it, please enjoy what you have caught. 180 lbs. of fresh fish sounds pretty yummy to me.
I would suggest you slash the tail nearly off as soon as practical to let it bleed and also gut it right away. By doing this you will also be letting the urea out which has been noted to foul the taste of shark. (From some of the reading, I understand that sharks have high urea content in the blood.
Bon Appetit, RT