Beachgoers beware: A mass of seaweed is floating in the Atlantic
Sargassum is a type of seaweed that floats on the surface of the Atlantic Ocean. It provides nutrients, shade, and shelter for marine life. But when there's too much of it, it washes up on beaches in Florida, the Caribbean, and Mexico. And that's a major problem for beachgoers and hotel owners. Plus, learn the English phrasal verb "wash up."