In the latest episode of Naked Oceans 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 so much rubbish. And in this show we look at the variety of things we’ve taken out of the oceans. Because as well as all the seafood we eat there are masses of things we take from the seas that we put to all sorts of uses, some are highly peculiar but highly prized and others are inspiring the latest generation of cutting edge medicines.

Christopher Kemp tells us all about ambergris - ancient, mysterious stuff and the subject of his new book - and ask him Is ambergris whale vomit or whale poop?

And we chat with Paul Jensen from Scripps Institution of Oceanography and Marcel Jaspars from the University of Aberdeen about how marine species from corals and sea squirts, right down to the tiniest bacteria, are offering up chemicals that could be potential new treatments for infectious diseases and cancer.

And Emmett Duffy embarks on a flight on fancy as he chooses our Critter of the Month.

As always you can listen to the latest episode of the Naked Oceans podcast for free at our website and at the iTunes music store, along with the entire back catalogue of Naked Oceans shows.