Here's a great animated short film called "Taking the Plunge" that follows a man who embarks on an underwater adventure after he accidentally loses his engagement ring when he's about to propose to his girlfriend on a boat dock.
When a young man's ideal marriage proposal is put in jeopardy he is forced to dive into unknown waters to salvage his plans...
After he dives in after it, an octopus comes along to help him find it. Unfortunately, the ring ended up near a terrifying shark, who isn't going to make things easy for them.
The short was directed by Thaddaeus Andreades, Marie Raoult, Nicholas Manfredi, and Elizabeth Ku-Herrero, and it's an all-around entertaining film that I think you'll all enjoy.