Who you callin' Mrs. Draper?
But if you were expecting her to don boat shoes and a rain slicker, you thought wrong.
Instead, the actress wears clavicle-scraping gold chain earrings, a wavy blonde pompadour, and an oil slick-esque slinky black top that nearly exposes her, er, Great Barrier Reefs.
(Note to Joan Harris: Be afraid. Be very afraid.)
Another shot -- taken by photographer Michael Williams -- sees her in a seaweed-style lemongrass paillette cocktail dress (above), metallic nails, and a slicked-back bob. What, did they have a dunking booth on the set?
The former model also opens up about her passion for ocean life, her career, and her unusual moniker.
"I have always loved my name," she says.
"You couldn't really make fun of it because it is a month. If anything, now people don't believe it is my real name.
"I was born in January, and my sisters and I are all J-J -- and I love it."Fair enough. Besides, we know better than to tease a gal who's got sharks on her side.
Meanwhile, check out Jones's dramatic hair makeover for Markt Beauty.