Beneath the Waves Film Festival: Microworlds – What Do Marine Mammals Eat? Posted on April 14, 2011April 2, 2011 By David Shiffman Science This 2011 Beneath the Waves Film Festival entry comes from Paul Hillman at NOAA. What Do Marine Mammals Eat? is part of the Microworlds series, which focuses on NOAA scientists interacting with public school students.