“Picture the bottom of the ocean. Anything below 1000 meters is fed entirely by ‘marine snow’ — the things that are supported by photosynthesis at the top of the ocean, and the things that eat them, and eventually fall to the ocean floor,” said Robert Vrijenhoek, a senior scientist at the Monterey Bay Aquarium Research Institute. “When a whale drops into your neighborhood, it’s roughly equivalent to 2000 years of marine snow falling in a millisecond.”