The U.S. Navy Has Dolphins. Actual Dolphins.

 Researched and written by ChatGPT

Just when you think humans have reached the outer limits of military technology, somebody at the Pentagon apparently looks at a bottlenose dolphin and says, “You know what that thing needs? A security clearance.”

This sounds like one of those internet stories that begins with a blurry photograph and ends three hours later with you wondering whether dolphins know classified information. Except this one is real. The United States Navy has operated a Marine Mammal Program since the 1960s, and today its highly trained workforce includes bottlenose dolphins and California sea lions. Their jobs include detecting underwater mines, locating submerged objects, recovering equipment and helping protect ships, harbours and naval installations from underwater intruders. (ONR)

And yes, the program overlaps with the strange underwater world occupied by Navy divers and special-warfare personnel. That distinction matters, because the internet version is often simplified to “Navy SEALs train combat dolphins.” The official Navy description is more specific: the dolphins and sea lions belong to specialized Marine Mammal Systems, while human divers and naval personnel work with those systems. There are also historical accounts of SEALs acting as mock enemy swimmers during exercises designed to test whether dolphins could locate somebody deliberately trying not to be found. (Navy SEALs)

Apparently, they could.

One former-SEAL account describes combat divers attempting all the tricks you'd expect from people professionally trained to sneak through water unnoticed: hiding beneath boats, hugging pier pilings, stirring up sediment and generally doing their absolute best impression of underwater ninjas. The dolphins reportedly found them anyway. The account is fascinating, although it should be treated separately from the Navy's official documentation because some of its more dramatic claims — particularly stories about weaponized dolphins — remain disputed. (Navy SEALs)

The part that isn't disputed is impressive enough.

Dolphins come equipped with biological sonar — echolocation — that allows them to detect and discriminate objects in difficult underwater environments where visibility can be practically nonexistent. The Navy says this makes them exceptionally useful for finding mines and other objects in the water column or buried along the sea floor. California sea lions bring a different résumé to the interview: excellent underwater vision, directional hearing and the ability to repeatedly dive to substantial depths. (Navy SEALs)

Which means somewhere in America there is presumably a dolphin whose LinkedIn profile could read:

Skills: sonar, mine detection, counter-infiltration, open-ocean operations, teamwork.

Weaknesses: fish.

The animals aren't merely laboratory curiosities, either. Navy documentation says Marine Mammal Program teams have been deployed into combat zones during both the Vietnam and Iraq wars. An earlier operational system was used for swimmer defence in Vietnam, while later marine-mammal teams were deployed in the Persian Gulf and supported military operations connected to Iraq. (Navy Integrated Warfare Center Pacific)

They also participate in military exercises. During RIMPAC 2018, for example, Navy bottlenose dolphins belonging to the Mark 7 Marine Mammal System performed mine-countermeasure training off Southern California. The Navy's own environmental documentation describes trained dolphins and sea lions operating with small boats, crews and SCUBA personnel to detect specified underwater objects. (U.S. Navy)

And these animals are apparently absurdly good at their jobs.

In 2013, two Navy dolphins conducting a routine training exercise off San Diego detected something buried in the seabed. Divers went down expecting another training-related object and instead uncovered pieces of a Howell torpedo dating from the 1800s, lost by USS Iowa during an exercise in 1899. More than a century after the Navy lost the thing, the dolphins found it. (Naval History and Heritage Command)

I feel this deserves a moment.

Humans: “We have no idea where that torpedo went.”

Dolphin, 114 years later: click click click.

“There.”

One of the more interesting parts of the program is that the animals routinely work untethered in the ocean. According to an account describing Navy Marine Mammal Systems, dolphins and sea lions can be transported by ship, aircraft, helicopter or vehicle, released into open water to perform their assignment, and trained to return to their handlers afterward. (Navy SEALs)

Basically, the Navy owns military personnel who could leave whenever they want.

They just come back.

Naturally, a program involving military dolphins has accumulated some spectacular rumours over the decades. Stories have claimed dolphins were trained to carry explosives, stab enemy divers, deliver poison or act as underwater suicide bombers. The Navy has repeatedly denied training marine mammals as offensive weapons, arguing that their roles are detection, marking, recovery and interdiction rather than independently deciding whom to kill. (Smithsonian Magazine)

There are nevertheless historical accounts from former military personnel describing exercises in which dolphins located SEAL divers and simulated attacks against them, including claims involving simulated CO₂ devices. Those stories are part of the mythology — and possibly part of the classified history — surrounding the program, but they shouldn't be confused with what the Navy publicly confirms. (Navy SEALs)

Frankly, the confirmed version is wild enough.

We have stealth aircraft, nuclear submarines, autonomous underwater vehicles, satellite surveillance and machine-learning systems capable of analyzing oceans of data.

And after sixty years of technological advancement, the United States Navy is still looking at a bottlenose dolphin and saying:

“Yeah. We can't build anything quite like that yet.”

Nature: undefeated.

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Sources

U.S. Navy / Naval Information Warfare Center Pacific — overview of the Marine Mammal Program and its deployments in Vietnam and Iraq. (Navy Integrated Warfare Center Pacific)

Office of Naval Research — history of the program and current use of bottlenose dolphins and California sea lions. (ONR)

U.S. Navy — Marine Mammal Program mine-clearance operations during RIMPAC. (U.S. Navy)

U.S. Navy environmental documentation — description of dolphins and sea lions working alongside SCUBA personnel in mine-hunting and object-recovery systems. (Navy Environmental Protection Agency)

Naval History and Heritage Command — Navy dolphins discover the lost 1899 Howell torpedo. (Naval History and Heritage Command)

U.S. Naval Institute Proceedings — history of marine mammals used for harbour and swimmer defence during Vietnam. (U.S. Naval Institute)

National Geographic — overview of Navy dolphins' mine-detection and intruder-detection abilities. (National Geographic)

NavySEALs.com — historical account of SEAL combat divers training against Marine Mammal Program dolphins, including the more controversial claims surrounding simulated attacks. (Navy SEALs)

I deliberately separated the documented Navy program from the juicy “attack dolphin” stories, because there really is enough verified weirdness here that we don't need to accidentally turn a former-SEAL anecdote into established fact.