Electric Ray
Lesser electric ray (public domain)
Electric rays are a group of rays capable of producing an electric discharge of anywhere from 8 to 220 volts. The electricity is used to stun prey, but it is also used for self-defense. An electric ray’s body typically consists of a broad and nearly circular disc, a short snout, and a short, thick tail. The shock delivered by the marbled electric ray is seldom deadly to humans but can be very painful.
This supplemental online resource accompanies the book Scuba Diving Hand Signals by Lars Behnke, available on
Amazon.