The Naturalist returns, and Bernie is joined by Paul Greenberg, author of "Four Fish: The Future of the Last Wild Food". Tune in to learn more about Atlantic salmon and sea bass and how farming has changed the destiny of these two popular types of fish. Find out how companies are trademarking certain genetically modified salmon and hear about everything from taxonomy to feed as it relates to fish. This episode was sponsored by Cain Vineyard & Winery.