Dolphins' 'Sixth Sense' Helps Them Feel Electric Fields

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The common Guiana dolphin has just divulged its sixth sense: the ability to sense electric fields. It is the first placental mammal known to pull off this trick, new research finds.

The dolphin, which bears live young like other placental mammals, most likely uses its sixth sense to find prey in the murky coastal waters it inhabits.

"Most of the animals which do this do this to find prey," said study researcher Wolf Hanke, of Rostock University in Rostock, Germany. "All of the dolphins' prey items, like crayfish, all of them generate electric fields to some degree."