The US Navy has been training dolphins and sea lions to detect undersea threats since the 1960s. A US Navy trainer with a Mark 5 Marine Mammal sea lion in Key West in October 1990. The program worked with sharks, rays, and sea turtles but settled on dolphins and sea lions. US NavyThe Navy Marine Mammal Program's budget for 2023 provides $40 million for "food, medicine, veterinary care, husbandry, and facilities," Wilson said. A US Navy sea lion jumps into a riverine command boat during a mine-countermeasures exercise in Bahrain in November 2014.

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