When animals find plastic refuse floating around in the ocean, they can mistake it for food and eat it. Over time, if they eat enough, they can begin to feel full and die of malnutrition. They can also get entangled in discarded packaging materials or abandoned fishing gear, leading to injury and sometimes death.
Article source: http://www.huffingtonpost.com/2017/04/12/plastic-trash-animals-photos_n_16409520.html?utm_hp_ref=hawaii&ir=Hawaii