Knifefish

The Knifefish is an autonomous unmanned underwater vehicle (UUV) under development by General Dynamics Mission Systems and Bluefin Robotics for the United States Navy. It is a propeller-driven minesweeping robot designed to replace the Navy's trained dolphins and sea lions after the retirement of the 50-year-old Marine Mammal Program in 2017. The Knifefish was first unveiled at a Navy exposition in April 2012, and was originally intended to operate in concert with the Navy's littoral combat ships (LCS) as part of a specialized counter-mine system. The Knifefish was used by the US in the 2026 Strait of Hormuz campaign.

Developed in 2021 in the United States, Knifefish provides a crucial capability for naval forces to clear dangerous underwater ordnance.