A 5,000-mile seaweed belt becomes a crisis scientists must decode.
Explore how floating sargassum can be both a vital Atlantic habitat and a toxic coastal threat when it washes ashore. This episode follows researchers using satellites, ocean sampling, and new tracking tools to uncover what is fueling the bloom and how communities might better predict and respond to it. Sign up to see the science behind a rapidly changing ocean problem.
- New shows weeklyFresh documentaries land every week.
- Exclusive originalsAward-winning films you can’t stream anywhere else.
- Watch anywherePhone, tablet, web and TV — pick up where you left off.
- No commitmentNo contract. Cancel in a click.
Frequently asked questions
Yes. Every plan unlocks the full library — including all Curiosity Originals like The Great Seaweed Invasion — in up to 4K, ad-free, on all your devices.
The Great Seaweed Invasion is a Curiosity Original, exclusive to Curiosity Stream.
Watch on the web, iOS and Android, Roku, Apple TV, Amazon Fire TV, Chromecast, Android TV, and most smart TVs. Start on one device and pick up right where you left off on another.
Curiosity Stream is our streaming service — thousands of documentaries and originals. The Smart Bundle is Curiosity Stream plus four other independent streaming services (Tastemade, Kidstream, Curiosity University, and SOMM TV) on a single subscription.