
Access to this video is a benefit for members through PBS Passport.
Back to Show
Changing Seas
Toxic Waters
Season 11
Episode 1102
Harmful algal blooms come in many forms, from toxic outbreaks impacting the health of animals and humans, to non-toxic but expansive sargassum mats devastating local economies and tourism. Scientists are working to understand what causes these blooms, how they impact us, and how we can stop them.
Support Provided By

Unlock with PBS Passport
26:51
Take a look at the health of the bottlenose dolphin.

Unlock with PBS Passport
26:51
The Changing Seas crew shadows a team of research divers in Dry Tortugas National Park.

26:45
Scientists develop sustainable aquaculture methods to take the pressure off wild fish.

26:46
Scientists scan the ocean floor to find deep sea corals threatened by bottom trawling.

26:49
Scientists at the world’s only underwater lab study the impacts of ocean acidification.

26:54
After being fished to near extinction, Goliath Groupers are making a comeback in Florida.