In the age of online proposal videos, finding the perfect way to pop the question is almost as challenging as finding the perfect life partner. For Markie Beth, it wasn't so much about going above and beyond everyone's expectations; it was about literally going below the surface for the surprise of a lifetime.

With the help of some trusted friends and SCUBA equipment, Markie accomplished the deepest romantic gesture ever: proposing under the sea.

Once underwater, Markie unveiled a series of touching signs for her girlfriend, Sarah. While Sarah is a marine biologist and divemaster, Markie is a rookie who secretly spent the month of May becoming SCUBA certified.

"I told you I'd go to the bottom of the ocean for your love ... but right now I'm only certified to 60 feet," Markie's signs leading up to the ultimate question read. She later sealed the deal by getting down on one knee when they were back on land. Of course, a very surprised Sarah said yes. Cue the waterworks!

Watch the full video here: