Gulf Corvina look pretty ordinary—they’re a couple of feet long and silvery. Yet the sounds they make—when millions get together to spawn—are a kind of wonder of the natural world. It’s also why they are in danger. Gulf Corvina live in only one place in the world—the Gulf of California. A decade ago, the Mexican government asked marine biologist Brad Erisman and his colleagues to study the Corvina. They were worried that heavy fishing might cause the population to collapse. When Erisman put a microphone in the water for the first time, he was blown away by the sounds he heard. Learn More Video: Spawning Aggregations (by Natural Numbers): https://youtu.be/bpLMCyx9cic Video: Corvina Harvest, El Golfo (by Marine Ventures Foundation): https://vimeo.com/21330986 Biological and fisheries monitoring of the Gulf Corvina in the Upper Gulf of California (by dataMARES): http://datamares.ucsd.edu/eng/projects/fisheries/biological-and-fisheries-monitoring-of-the-gulf-corvina-in-the-upper-gulf-of-california/ Unmanaged Fishing at Spawning Sites Put Species, Economies at Risk (by UT Marine Science Institute): https://utmsi.utexas.edu/blog/entry/unmanaged-fishing-at-spawning-sites-put-species-economies-at-risk About Point of Discovery Point of Discovery is a production of the University of Texas at Austin's College of Natural Sciences. You can listen to all our episodes at @point-of-discovery . You can also subscribe via iTunes: https://itunes.apple.com/us/podcast/point-of-discovery-podcast/id1036884430?mt=2 or via our RSS feed: http://feeds.soundcloud.com/users/soundcloud:users:150441582/sounds.rss or via Stitcher: www.stitcher.com/podcast/point-of-discovery or via Google Play: https://play.google.com/music/m/Igc5ifenl2bn7e5n2klmrwah7qq?t=Point_of_Discovery Questions or comments about this episode, or our series in general? Email Marc Airhart at mairhart[AT]austin.utexas.edu