A military marine mammal is a cetacean or pinniped that has been trained for military uses. Examples include bottlenose dolphins, seals, sea lions, and beluga whales. The United States and Soviet militaries have trained and employed oceanic dolphins for various uses. Military marine mammals have been trained to rescue lost naval swimmers, guard navy ships against enemy divers, locate mines for later clearance by divers, and aid in location and recovery of equipment lost on the seabed.