Tom Brady dominates on land, air ... and now by sea -- 'cause the QB just bought a multi-million dollar boat and we've got the pics!
TMZ Sports has learned ... the Tampa Bay Bucs star ordered up a custom 40-plus-foot, state-of-the-art watercraft to enjoy during his time in Florida.
The boat was delivered on Thursday at his local marina in St. Petersburg -- and Tom was as excited as a kid on Christmas!
You can see how happy he looks in the photo -- smiling from ear to ear as the ship was handed over.