Investigates why so many of our ocean's animals are disappearing. Case studies focus on global issues including climate change, sea-level rise, over-fishing and habitat destruction. Antarctica: The Emperor penguin is dependent upon sea ice to reproduce and raise its young. But global warming is beginning to melt the sea ice surrounding the Antarctic, and it could lead to the extinction of the species. Melbourne Beach, Florida: Sea turtles have been wandering the oceans of the world for millions of years, but will they be able to survive the industrial age? The community of Melbourne Beach is taking postive action to reverse some of the damage that has already been done. Klamath River: Once the thrid richest salmon river in the United States, today a battle over water rights threatens the cultural and economic lives of both native Americans and commercial fisherman. Monterey Bay, California: Sea otters in Monterey Bay have rebounded from the brink of extinction. This has had an enormouos impact on the health of the local ecosystem, particularly the kelp forests that are homes to tens of thousands of fish and marine animals.

CIRC # 393\\Originally produced as an episode of the television program Journey to planet Earth on PBS in 2009. Special features: Abridged version (37 min.); Educators' guides (DVD-ROM). Public performance video.

Opening segment -- New England cod -- Over-fishing -- Sharks -- Sea turtles -- Emperor penguins -- Climate change -- Klamath river -- Dolphins -- Sea otters -- Closing segment.