. >> daljit: trinidad and tobago. its ribbean waters once supplied a very lucrative fishing industry - worth hundreds of millions of dollars. but all that's changed - its value has plummeted by more than half - causing some one thousand fishermen to worry. it's a phenomenon happening across the globe as fish stocks dwindle. the reasons -fishing techniques that slowly erode the ocean's ecosystem ... and many argue the dangerous effects of drilling for oil and natural gas under the ocean floor. >> dragon: about the last five years, we used to catch fish by 400 and 500 lbs. now, you can't catch 100 pounds of fish. >> daljit: 43 year-old dragon has spent nearly a quarter of a century fishing these waters, depending on the sea to support a wife and two children. he says he's watched his livelihood slip away ... the problem was evident back in mid-2009 when thousands of dead fish washed ashore on trinidad's southwestern tip... not even the birds ate the carcasses. >> dragon: the whole beachside was just dead fish, the whole