Ocean treasures, old and new

Is ambergris whale vomit or whale poo? We find out in Naked Oceans this month as we dive into ocean treasures, old and new. Last month we explored some of the ways we pollute the oceans by using them as a dumping ground for too much rubbish. And in this episode we look at the variety of things we've taken out of the ocean, from prized perfumes to inspiration for new medicines. Christopher Kemp tells us all about the mysterious stuff, ambergris - the subject of his new book. And at Scripps Institute of Oceanography, we call in on some researchers who are putting glowing critters to good use. And in Critter of the Month, Emmett Duffy tell us, if he was a marine creature, which one he'd be and why.