Pilot whales general eat squid, but it's likely the whale "mistook the floating plastic for food." The mass of plastic then prevented the whale from ingesting anything that would provide nourishment.
“If you have 80 plastic bags in your stomach, you die,” Thon Thamrongnawasawat, a marine biologist and lecturer at Kasetsart University, told Agence France-Presse.
The rescue team kept the pilot whale -- which vomited up a total of five plastic bags -- on the beach with buoys to prevent it from sliding further into the sea and drowning. In what might be the most disturbing deal of a disturbing story, it was reported that there were "so many long black plastic bags that authorities were running out of room to maneuver in the operating room without standing on trash."