electroreceptor

noun Zoology.

1. any of an array of tiny, electrically sensitive ampullar organs present in sharks, electric eels, catfish, and certain other fishes, each organ being composed of a bundle of nerve fibers and sensory cells within a gel-filled conducting duct that can pick up weak electrical currents emitted by creatures moving in the water.

noun

1. zoology an organ, present in some fishes, that detects electrical discharges