Access to this video is a benefit for members through PBS Passport.
Up Next
Back to Show
Watch Preview
Changing Seas
Alien Invaders
Season 3
Episode 301
In the waters of the western Atlantic and Caribbean, a voracious alien predator has taken hold. Native to the Indo-Pacific, the invasive lionfish is a major threat to biodiversity and the health of already stressed coral reef ecosystems.
Support Provided By
Unlock with PBS Passport
27:13
Scientists experimant to see if giant manta rays are impacted negatively by microplastics.
Unlock with PBS Passport
27:13
Changes to the ocean environment affect the way carbon is cycled through the seas.
Unlock with PBS Passport
27:13
Lake Okeechobee, once the blue heart of Florida, now has putrid mats of blue green algae.
Unlock with PBS Passport
26:43
Visit the remote Pacific, the islands of Maug - a natural laboratory for scientists.
Unlock with PBS Passport
26:43
Some scientists are suggesting that ctenophores are the oldest sea animals.
Unlock with PBS Passport
26:44
Researchers provide data necessary to protect fish populations from further decline.
Unlock with PBS Passport
26:42
Researchers study what impact ecotourism might have on southern stingrays.
Unlock with PBS Passport
26:43
Researchers are beginning to understand where turtles go during their “lost years.”