I will second Kev's motion that sight fishing these 150+ pound silver/blue/dayglow arrows of energy is a blast!
My 170ish pound fish pretty much went like this:
Spot a marlin tooling around on the surface. They don't seem to care that a boat is coming up on them, as they just sit there and twiddle around looking for, or harassing food. In the meantime, you grab your rod, bait up with a live bait, and cast out the bait any where near the marlin.
The bait instantly realizes there's a real BIG fishy near by and takes off like there's no tomorrow. The little guys even manage to move some line off of the reel (it's in freespool).
It took all of about 2 seconds for the really BIG fishy to think "Mmmm, food." and charge for the bait. Not to worry if you can't see the action, as you will know when Mr. Marlin has grabbed hold of your bait as the line will start to SMOKE off your reel. Wait about 10 seconds, slam home the spool lock, set the hook several hard times and HOLD ON!
The first thing you notice is a sound. That's the sound of line peeling so hard and fast off your reel that it's smoking! What a great sound!
I'd say the average fight is about 45 minutes, with several 100+ yard (true, not exaggerated) yard runs. Count on seeing the fish, leap, dance, tail walk, and skim across the water on many a run.
I'd consider myself an "expert" when it comes to fighting a fish, regardless of the size. I can honestly say that it took me a good 45 minutes, and put blisters on every one of my fingers to bring this fish in to the boat. I seriously put the screws to my fish, and it just tore me up.
Too bad steelhead don't fight that hard.
I HIGHLY recommend everyone do this at least once. I will be down in Cabo to do this again next year! I can't wait!
I have never caught a Durado, so I am highly jealous of your nephew, Kev! I sooooo want to hook in to one.
Apparently, once I'm ready to do some "real marlin" fishing, I'm suppose to save my pennies and fish with Rooster in Panama for Rooster Fish and 1000 pound Black Marlins. So I've been told, Panama is where it's at for the big Blacks and awesome salt fishing. Oh great, one more fishing destination I need to do. I'll add it to my list.
Ugh. I can't even imagine a 5-8 hour fight for a fish. Sign me up!