Host Mike G. dives into new discoveries from the exciting field of marine bioacoustics research that are helping us better understand the lives of whales and dophins, and we feature fascinating recordings from that research. His first guest is Erin Ross-Marsh, the lead researcher on a study of humpback whales at the Vema Seamount in the South Atlantic off the coast of South Africa. Ross-Marsh tells us about the study’s finding that these humpbacks were making gunshot calls, a type of non-song call that was previously unknown in these particular whales, and plays some humpback songs, non-song calls, and gunshot calls for us to listen to. He also speaks with Sarah Trabue, a research assistant with the Wildlife Conservation Society (WCS) who is the lead author of a recently published paper detailing the findings of a bioacoustic study of bottlenose dolphins in and around New York Harbor. Trabue discusses what the study reveals about dolphin behavior in the highly trafficked waters around New York City and plays for us some of the dolphin vocalizations recorded as part of the study. Further reading: • Mongabay: “What’s popping? Humpbacks off South Africa, new acoustic study finds” • WCS: “The New York – New Jersey Harbor Estuary is a Dining Hotspot During Summer and Autumn Months for Bottlenose Dolphins” Episode artwork: humpback whales off the coast of Hawaii. Photo Credit: Ed Lyman/NOAA. Please invite your friends to subscribe to the Mongabay Newscast wherever they get podcasts, or download our free app in the Apple App Store or in the Google Store to get access to our latest episodes at your fingertips. If you enjoy the Newscast, please visit www.patreon.com/mongabay to pledge a dollar or more to keep the show growing, Mongabay is a nonprofit media outlet and all support helps! See all our latest news from nature's frontline at Mongabay's homepage: news.mongabay.com or find us on Facebook, Twitter, and Instagram by searching for @mongabay. Please share your thoughts and ideas! submissions@mongabay.com.