March Mammal Madness, the annual tournament of imaginary combat pitting species against species is back, in its 9th year. Organizers cite scientific literature to substantiate likely outcomes when two species fight in glorious battle in environments both suited for their evolutionary traits, and completely random ones. The Ocean Science Radio team interviews founder Professor Katherine Hinde, of Arizona State University, and fight "announcer" Professor Josh Drew, of SUNY College of Environmental Science and Forestry, about this amazing event, how battles are decided, and how impactful this event has been in science communications efforts. Come for the science, stay for the heartache and don't forget to make your own bracket at https://libguides.asu.edu/marchmammalmadness.