• Ingestion of plastic by marine fish and sharks is understudied.
• Attacks on plastic were estimated using apparent bite marks on beached items.
• 16% of items had apparent bite marks, extrapolated to 1.3 tons a year for one area.
• Bottle shapes, and blue or yellow colors, were attacked more frequently.
• Tooth widths of marks ranged from 1 to 20 mm, suggesting many species ingest plastic.
Henry S. Carson, Marine Pollution Bulletin, Volume 74, Issue 1, 15 September 2013, Pages 170–174