Eat Electric Death
Because fish is good for you:
“A fish of this species occasionally raises its frequency but never lowers it, Tallarovic says. She suspected signal jamming when she noticed upward frequency shifts as one fish attacked another. “Everybody just told me, ‘No, it’s got to be an artifact,’” she says.
“So, she and Zakon monitored fishes’ electric fields in several scenarios, the team reports in an upcoming Animal Behaviour. When researchers put two fish in an unfamiliar tank or used a field-emitting dummy to mimic an intruder in a fish’s home tank, both males and females tended to raise their electric-field frequencies as they attacked. The changes’ timing and context convinced the researchers that the attacking fish was jamming the other’s signals.”
LINK: Electrical Fish Jamming