Macroplastics range in sizes from cigarette butts, bottle caps, and straws to buoys, plastic crates, and inflatable water toys.
"Marine litter..." by Bo Eide is licensed under CC BY-NC-ND 2.0
Microplastics are less than 5mm in length. Plastics smaller than a few microns have been coined Nanoplastics.
Microplastic by Florida Sea Grant is licensed under CC BY-NC-ND 2.0
Nurdles are plastic pellets used to create plastic products.
"NoPetroPA-plastic-nurdles..." by Mark Dixon is licensed under CC0 1.0
Modern fishing nets are typically plastic (nylon).
"Seal entangled in fishing net" by NOAA Marine Debris Program is licensed under CC BY 2.0