Follow the alarming spread of Caulerpa taxifolia, the so-called "killer alga," as it colonizes new waters around the world.
The Impact of
Alexandre Meinesz explores varying degrees of menace posed by alien invaders.
Ecologist Daniel Simberloff outlines strategies for combating weed-like species, both those that have gained a foothold and those that might.
Take a look at 10 successful invaders and see if you can match them to the damage they've caused in their new environments.
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NOVA News Minute
Watch a news clip related to NOVA's "Deep Sea Invasion" program.
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