Lisa - Marie Gershwin : Fish taking over vulnerable seas , eating other creatures . She says jellyfish can feed off life - sustaining krill that 's harvested for omega-3 supplements . Gershwin : Jellyfish thrive as oceans get warmer ; they eat the eggs and larvae of fish . Gershwin : Refrigerator-sized jellies growing in the seas of China and drifting into Japanese and Korean waters . We need to help industry stop polluting water and prevent global warming .
Lisa - Marie Gershwin : Fish taking over vulnerable seas , eating other creatures . She says jellyfish can feed off life - sustaining krill that 's harvested for omega-3 supplements . Gershwin : Jellyfish thrive as oceans get warmer ; they eat the eggs and larvae of fish . Gershwin : We need to help industry stop polluting water and prevent global warming .