Electitail spins the two wires on its tail to generate electricity. The motion helps increase its spinning speed, and also discharges a spiral of lightning from its tail, which makes for an effective combat maneuver.
To withstand the crushing water pressure deep under the sea, its spine is very thick and sturdy. It pushes the tips of its two tails against the foe, then lets loose with over 20,000 volts of power.