The Ocean ‘Was the Color of Chocolate.’ Mexico Declares War on Seaweed.

What happened: Mexico's Navy is fighting a massive sargassum bloom that dumps thousands of tons of seaweed onto Caribbean beaches daily, part of an effort to protect the country's tourism-reliant economy. Why it matters: The cleanup effort is aimed at protecting Mexico's tourism-reliant economy from the bloom.

Mexico's Navy is fighting a massive sargassum bloom that dumps thousands of tons of seaweed onto Caribbean beaches daily, part of an effort to protect the country's tourism-reliant economy.

The cleanup effort is aimed at protecting Mexico's tourism-reliant economy from the bloom.