Last endangered Mexican porpoises to be rounded up by US Navy-trained dolphins

Conservation plan involves sending dolphins into Gulf of California to find vaquita and then surface to raise the alarm

US Navy-trained dolphins and their handlers will participate in a last-ditch effort to catch the last few dozen of Mexico's vaquita porpoises to save them from extinction.

The trained animals will use their sonar to locate the extremely elusive vaquitas, then surface and advise their handlers.