The extensive ecosystem under the waves depends on the intricate, complex and mysterious mating rituals of its inhabitants. Host Steve Curwood speaks with Marah Hardt, a marine biologist and author of a new book, Sex in the Sea about some clever and unusual reproductive strategies unique to sea-dwellers and why understanding this is critical for maintaining the resource. They then discuss how lobsters communicate their readiness to mate, how some whales try to ensure their genes will persist, and how static corals in reefs manage to make more corals, and Hardt argues that success in their various methods are vital for sustainable fisheries. (published February 12, 2016)