According to a study published in the journal Nature Communications, whales can consume up to 10 million pieces of microplastic per day. The study was conducted by researchers at the University of California, Santa Barbara, who analyzed the stomach contents of 20 blue whales. They found that the whales had ingested an average of 10 million pieces of microplastic, ranging in size from 0.05 to 5 millimeters. The researchers believe that the whales are ingesting the microplastic while feeding on krill, which are small crustaceans that filter-feed on the water. The study highlights the potential risks of microplastic pollution to marine life.