These devices use an electric field to scare sharks from fishing hooks

A new gadget attaches to fishing lines and emits a pulse of electricity every two seconds

Several blue, cylindrical SharkGuard devices hanging by string off a rail

By attaching cylindrical SharkGuard devices (shown) to fishing hooks, tuna fishermen can greatly reduce the number of blue sharks accidentally snagged, a study finds.

Fishtek Marine

A new gadget takes advantage of sharks’ sixth sense to send the fish scurrying away from deadly hooks.