>In addition to Marium eating plastic, biologists believe she was pursued by an overly aggressive male during the mating season.
>"We assume she wandered off too far from her natural habitat and was chased and eventually attacked by another male dugong or dugongs," Jatuporn Buruspat, director-general of the Department of Marine and Coastal Resources, told the AP.
It seems that Marium died after being attacked by one or more males. Although the article mentions plastic in her intestines, nowhere does it say that the plastic was the cause of death. There is a good chance that a lot of the marine life invests plastic and we just notice it when we perform a necropsy after a death.