What is the difference between the Navy and and the Marines?

The Marines are like the Navy's "army." As others have said, virtually all Navy vessels have Marine detachments on board. Pick any aircraft carrier and I can virtually guarantee that at least one squadron in a Carrier Air Wing will have F/A-18's that say "MARINES" on them.

They learn naval terminology in Boot Camp; i.e., a "stairway" is a "ladder" and a "latrine" is "the head."

Much of their operational support comes from the Navy, like medical officers and Chaplains.

That said, they have more independence from the Navy than the British Royal Marines do from the Royal Navy.

The Marine Corp. is a division of the Navy. There were Marines aboard every naval vessel I served on.

Navy deals with the ships while the Marines disembark from the ships.

Marines are the ones with the attitude.

The Navy Sail and work in Boats the USMC are its Passengers

Marines are an amphibian force used to secure both shipboard security and hold land if necessary. Naval forces are concerned with shipboard operations.

The Short Answer: Pretty much everything except some of the Schools they attend and the Dept they work for.

Responsibilities.

Marines get sea sick. Sailors don't.