Gyres!

This lovely map of Ocean gyres appears in a long winded article on Medium

Gyres are where currents gather large patches of garbage. Much of this garbage is non-biodegradable plastic that is often consumed by fish and other tasty critters. The future effects of all this plastic on humans is not completely understood but it's not likely to be nearly as pretty as the map. Here's a detailed view-a good example of how less can be more in a map.