To save the world's rarest marine mammal, conservationists seek ban on Mexican seafood imports

LOS ANGELES - A decade of rescue crusades by conservation groups, hard-core eco-activists and the U.S. Navy have failed to prevent the world's rarest porpoise from becoming fatally entangled in gill nets set for seafood in Mexico's northern Gulf of California.

Now, with less than 20 vaquita left in the wild, the prospect of the species' extinction within two years has prompted a last-ditch effort with significant economic and political consequences for the United States and Mexico.

Conservationists on Tuesday asked an international trade court judge