https://techcrunch.com/2023/03/23/startup-says-the-seaweed-blobbing-toward-florida-has-a-silver-lining/

A brown macroalgae native to the Atlantic’s Sargasso Sea is increasingly a menace to coastal ecosystems and communities across the Gulf of Mexico, ever since mats of the normally beneficial seaweed (known as sargassum) exploded in numbers in 2011. This is the backdrop for Carbonwave, which recently raised $5 million to put the hulking algae blooms to good use.

Researchers say farm and sewage runoff is likely driving the now 5,000-mile-wide “Great Atlantic Sargassum Belt.” Climate change may also be playing a role.