Litter abundance and typology were investigated at different beaches and mangrove forests at nine sites on the Colombian Caribbean and Pacific coasts. Average litter abundance on the Caribbean Sea beaches (1.42 items/m2–12.21 g/m2) and in mangrove forests (1.29 items/m2–28.72 g/m2) were greater than that of the Pacific Ocean beaches (0 items/m2–0 g/m2) and mangrove forests (1.13 items/m2–79.41 g/m2). The most abundant litter m...