The United States Navy has recently completed testing of a robotic fish, called Silent Nemo, that performs underwater surveillance missions. Modelled on a bluefin tuna, the Navy hope to use the submersible drone to undertake secret underwater inspections. The Silent Nemo prototype was tested at the Joint Expeditionary Base Little Creek in Virginia by researchers from the Naval Operations Rapid Innovation Cell (CRIC) and Boston Engineering. A similar device known as GhostSwimmer has also been used by Boston Engineering to gather data on tides, currents, wakes, and weather conditions and resembles the swimming style of a large fish. Director of Boston Engineering’s Advanced Systems Group, Michael Rufo, explained, “GhostSwimmer will allow the Navy to have success during more types of missions while keeping divers and sailors safe.”