They were not the Navy Seals in WWII. My father was Navy UDT #6 and the Underwater Demolition Teams were the foundation of what would become the Seals. He did a lot more than clear mines too, BTW.
Well aware of the history of the UDT/SEAL teams. Visited the UDT/SEAL Museum (twice) in Fort Pierce, FL which was the original WWII training site for Navy UDT. Met the curator of the museum, at the time, 'Patches' Watson. He was an original plank owner when UDT transitioned into the SEAL units. Also met a WWII UDT vet that cleared the landing zone of underwater obstructions at Iwo Jima prior to the Marines amphibious assault of the island.