The fishermen of Gloucester, Massachusetts, head for open seas in hopes of catching the first fish of the Atlantic Bluefin Tuna Season.

The fishermen of Gloucester battle for prime fishing spots in their quest to catch the elusive and lucrative Bluefin Tuna.

For the tuna fishermen of Gloucester, Massachusetts, it's tournament time, and, with a big cash prize up for grabs, the fight is on to catch the biggest bluefin.

The fishermen of Gloucester, Massachusetts, are facing a dangerous new foe, with great white sharks swarming into local waters.

The fishermen of Gloucester, Massachusetts, battle droves of bumbling amateur fishermen in their bid to catch lucrative Atlantic Bluefin Tuna.

A storm is racing towards the north Atlantic fishing grounds, but with time ticking away on the bluefin tuna season, the captains have no choice but to head out to fish in the rough weather.

It is week eight of the North Atlantic Bluefin tuna fishing season, and cracks are starting to show in the Gloucester fleet, with captains and crews pushing each other to the limit.

The fishermen of Gloucester, Massachusetts, battle for the elusive and lucrative giant Bluefin tuna, with harpooners going up against rod-and-reelers.

Tensions reach their breaking point amongst the Gloucester fleet as captains, mates and vessels fall apart.

It's a battle of wills on the North Atlantic, as two of Gloucester's top Bluefin fishermen - friends-turned-foes Paul Hebert and Dave Carraro - go head-to-head to out-fish each other.

With only four weeks left in the Atlantic Bluefin season, two boats have the challenge of novice fishermen on board – and it could make or break their season.

The Atlantic Bluefin are starting to migrate out of New England waters, so the Gloucester fleet races to find any edge they can, but will their risky new strategies pay off?

With only two weeks left on the North Atlantic Bluefin tuna fishing season, just one fish is not enough for the Gloucester captains – and the lure of doubling their luck is overpowering.

In the first episode of a two-part season finale, Gloucester's reigning Bluefin champion Dave Carraro, of FV-tuna.com, starts the fishing season with a $20,000 lead over his rival.

With only three days left in the North Atlantic Bluefin Tuna season, the captains of Gloucester race against each other - and an oncoming storm - in the battle to land their final fish of the season.