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Runtime: 00:30 (hours:minutes)
Produced in 1997; released on DVD in 2005.
An environmental mystery story that follows the work of scientists specializing in invasion ecology. Dozens of alien species are infiltrating hundreds of American harbors, bays, and estuaries. Green crabs, zebra mussels, toxic dinoflagellates, and dozens of other aliens are altering the ecology and commercial fisheries of our coastal ecosystems.