- "The Nuptuna! Lives in the ocean. Seeing one is supposedly good luck for impending nuptials. Loves special celebrations."
- — Ocean Fishing Hole Poster description
The sight of a Nuptuna is consider good luck for couples about to be married and is said to love special celebrations. As a result, it is attracted to the Couple's Mask due to what the mask represents. Can be caught on the either the First or Final Day.
Its name is a portmanteau of the words Nuptials and tuna.