The stomach of a dead Cuvier's beaked whale was found to be filled with over 40 kilos of plastic trash.
When the necropsy was performed, Blatchley told NPR, he was not prepared for the amount of plastic they found in the whale's stomach.
In a Facebook post Sunday, the D' Bone Collector Museum explained that the plastic bags included 16 rice sacks and multiple shopping bags.
"Action must be taken by the government against those who continue to treat the waterways and ocean as dumpsters", it said.
The death comes just weeks after the Global Alliance for Incinerator Alternatives released a report on the "shocking" amount of single-use plastic in the Philippines, including almost 60 billion sachets a year.
He said the full list of plastic materials will be itemized in the coming days.
"It had been vomiting blood before it died", he said, learning during the necropsy that the cause of death was not natural.
The whale's death follows a report released by the Global Alliance for Incinerator Alternatives which documented a "shocking amount of single-use plastic in the Philippines".
By the time marine biologist Darrell Blatchley arrived at the fishing village Saturday, the young Cuvier's beaked whale was already floating, dead in the water, its eyes sunken and ribs protruding through its skin.
The WWF predicts that because the increase of plastic usage has overwhelmed the capacity of waste management, "ocean plastic leakage will remain above nine million metric tons per year until 2030".
Although scientists weren't able to ascertain what killed the animal, it was a harsh warning about the dangers of plastic pollution.
"This can not continue", Blatchley said, noting the Philippines ranks as the second most plastic-polluted country in the world.
Last year, in Indonesia, a sperm whale was found with six kilograms in its stomach, including more than one hundred throw-away drinking cups.