Marines is amphibious...
Don't I know it...
The Recon platoon that I had the honor of playing wargames with for a while was a special group of guys... those guys were just banananutcakes. Loved 'em. You could'a had a meeting with those guys and said... "Your mission is to go out and disable that supertanker with no weapons other than your teeth. You'll swim two miles to the ship, climb up the anchor chain and then take the ship by chewing through the control cables to the rudder." Their answer? "OK". Gotta love 'em. :-)