Electric eels are the sluggish inhabitants of slow freshwater basins in South America. Cylindrical, scaleless, and gray-brown, they can grow to nine feet (2.75 m) long and weigh up to 49 pounds (22 kg). The electric eel, however, is not a true eel, but is rather a knifefish that can produce a shock—powerful enough to stun a human—while hunting or in self-defense. The shock is produced by the electric organs in its body that generate charge in a manner similar to what common household item? Discuss