WHO: As the trophy wife with Grace Kelly-like reserve in the Emmy-winning AMC series “Mad Men,” film and TV actress January Jones has become the poster girl of domestic alienation during the Kennedy era. Jones’ film credits include “We Are Marshall” (2006), “The Three Burials of Melquiades Estrada” (2005), “Anger Management” (2003) and “Love, Actually” (2003).

WHAT: Oceana is an advocacy group dedicated entirely to the protection and restoration of the world’s oceans. The campaign-driven organization aims to protect collapsing fish populations, stop global contamination and protect endangered species like marine mammals and sea turtles. Jones signed on specifically to act as a celebrity spokesperson for decimated shark populations.

WHY: Growing up in relatively landlocked South Dakota, Jones says she was “fascinated by the ocean and everything in it.” She was especially enthralled with sharks. “I had shark books and every documentary I could get my hands on. I think they’re incredibly beautiful and prehistoric.” When Jones finally did see the ocean at age 15, her interest deepened. “When I heard that shark populations were being depleted by staggering numbers, I realized (Oceana) would be a perfect play to put my time in to save our environment. Because without sharks, there is no ocean life.”

WHAT’S NEXT: Jones has just wrapped up PSAs shot in the Bahamas with baby lemon and nurse sharks. In April she will do a whale shark dive in Belize with Oceana, and this month she was to head to Washington, D.C., to fight for a shark bill that has already passed in the House. “You already can’t bring sharks without fins intact into the Atlantic coast. This (law) would expand to the Pacific, effectively stopping finning in American waters,” she explains, Finning is the process of removing just the fin of a shark (for food) and then setting it free, causing the shark to die a slow death.