stingray

The giant stingray is one for the books.
Most stingrays have one or more barbed stings on the tail, which are used in self-defense. They will not attack humans but
Surveillance technology like StingRay can sweep up data from any cell phone in its range.
Stingray City, Grand Cayman - On this shallow dive on a sandy bottom, hordes of southern stingrays surround you as they glide
It's using surveillance devices originally developed for the CIA.