Dr. Carl Safina on sustainable fishing .

Dr. Carl Safina, founder of the Safina Centre, author of seven books on fish and fishing, and host of the PBS series called "Saving Our Oceans", speaks candidly about his hopes, fears and experiences with sport and commercial fishing. He challenges catch and release by asking when is enough enough. He explains why harvesting fish is more ecologically sound than eating tofu. Recent wild swings in fish stocks are explored, and he reflects on the challenges of getting out the message that fishing is a sport that could be around for ever, but not if we don't change our approach.