Wow, I am impressed, thought water environment was not there thing. But they put a serious hurt on the bad guys that have taken over New Orleans, a serious serious hurt.
But they put a serious hurt=HOPE hey put a serious hurt
There's a Delta story that some desk jockey wanted a team to HALO into the mediterranean and SCUBA it to shore to deliver a radio to the US Embassy in Beirut in the 80's. The operator told him something to the effect of FU and the horse, etc. and told him: "We'll fly commercial into Jordan and then drive to Beirut to deliver your damn radio".
At any rate, Army SF also have underwater capabilities.