^w^ If the small fish, invertebrates, and crustaceans were to die out, there would be no food for the large fish.
^w^ Large sharks would disappear rapidly if their food source, the large fish, was no longer available.
^w^ Zooplankton would thrive initially, but as they consumed their food source, the phytoplankton, they would kill off the only source of oxygen to the ocean and would eventually disappear.
