Access to this video is a benefit for members through PBS Passport.
Back to Show
Watch Preview
Changing Seas
Grouper Moon
Season 4
Episode 403
During the winter full moons Nassau grouper gather in large numbers to spawn. Most of the known spawning sites have been fished out, but the Cayman Islands are home to the last great reproductive population of this endangered species.
Support Provided By
Unlock with PBS Passport
26:53
Scientists study what makes certain corals more resilient than others.
Unlock with PBS Passport
26:42
Scientists study the devastating impacts of the Deepwater Horizon oil rig disaster.
Unlock with PBS Passport
26:42
Discover the Cordell Bank, a magical underwater island few people have ever heard of.
Unlock with PBS Passport
26:42
Scientists study tarpon, bonefish and permit to better understand their behaviors.
Unlock with PBS Passport
26:43
Modern technology is making it possible to correlate dolphin sounds and behavior.