What is "electroreception"

n. The biological ability to perceive electrical impulses, used for electrolocation and electrocommunication and particularly common among aquatic creatures (since salt water is a more efficient conductor than air).

Electroreception is the biological ability to perceive natural electrical stimuli. It has been observed almost exclusively in aquatic or amphibious animals, since salt-water is a much better conductor than air, the currently known exceptions being echidnas, cockroaches and bees. Electroreception is used in electrolocation (detecting objects) and for electrocommunication.