Former WWE Champ The Miz tied the knot this week in the Bahamas ... marrying his longtime girlfriend/former Diva Maryse Ouellet -- and it sounds like the whole event was pretty baller.

TMZ Sports obtained photos of their nuptials -- which took place Thursday at the One and Only Ocean Club -- where they said "I Do" in a garden overlooking the ocean and filled with 12th century ruins.

We're told a private party was held for the newlyweds afterward at the Atlantis resort ... and they were surrounded by giant aquariums filled with sea life.

WWE Superstar Zack Ryder was on hand for the special occasion (pictured below) ... as well as former WWE Diva Kelly Kelly.