Biologists in the Great Lakes region - which spent an estimated $120 million in cleanup costs in one five-year period following the zebra mussel invasion in 1988 - have tried everything from chemicals like chlorine, copper sulfate or molluscicides, freezing or drying, to electrocution and radio waves to kill them, but none of those methods worked.

So we know who will maintain the oceans when the Cockroaches inherit the earth.